CONSENT AND FIRST AMENDMENT TO THIRD
                      AMENDED AND RESTATED CREDIT AGREEMENT


         This CONSENT AND FIRST AMENDMENT TO THIRD AMENDED AND RESTATED CREDIT
AGREEMENT (this "Amendment") is entered into as of October 5, 2001 among
BRANDYWINE REALTY TRUST ("BRT"), a Maryland real estate investment trust and
BRANDYWINE OPERATING PARTNERSHIP, L.P. ("BOP"), a Delaware limited partnership
(collectively, the "Borrowers"), certain Subsidiaries of the Borrowers as
Guarantors, the Lenders party hereto and BANK OF AMERICA, N.A. as Administrative
Agent for the Lenders (the "Administrative Agent"). Capitalized terms used
herein and not otherwise defined shall have the meanings set forth in the Credit
Agreement (as defined below).

                                    RECITALS

         WHEREAS, the Borrowers, the Guarantors, the Lenders and the
Administrative Agent entered into that certain Third Amended and Restated Credit
Agreement dated as of June 29, 2001 (the "Credit Agreement");

         WHEREAS, three of the Guarantors (Brandywine Durham Partnership, a New
Jersey general partnership, Brandywine Axinn Avenue Partnership, a New York
general partnership and AAP Sub three, Inc., a Delaware corporation) were
dissolved by the Borrowers because they had no assets or revenues and,
therefore, they are no longer Guarantors;

         WHEREAS, the Borrowers and the Guarantors have requested that the
Required Lenders consent to the release of certain other Guarantors and agree to
amend certain terms of the Credit Agreement; and

         WHEREAS, the Required Lenders have agreed to consent to the release of
certain Guarantors and agreed to amend certain terms of Credit Agreement on the
terms, and subject to the conditions, set forth below.

         NOW THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

                                    AGREEMENT

         1. Consent. The Required Lenders consent and authorize the
Administrative Agent to take such action, as reasonably requested by the
Borrowers, to irrevocably release each of (a) Brandywine Dominion, L.P., a
Pennsylvania limited partnership and (b) Plymouth TFC General Partnership
(previously known as Plymouth Meeting General Partnership), a Pennsylvania
general partnership from its obligations as a Guarantor under the Credit
Documents. The Borrowers represent and warrant to the Lenders (with the
knowledge and understanding that the Required Lenders are relying on this
representation and warranty in giving the consent set forth in the previous
sentence) that attached hereto as Exhibit A is a complete and accurate officer's
certificate (in the form of Exhibit 7.1(c) to the Credit Agreement), dated as of
June 30, 2001, giving effect to the release of the above-referenced Guarantors.


         2. New Definitions. The following definitions are added to Section 1.1
of the Credit Agreement, in the appropriate alphabetical order, to read as
follows:

                  "Grande A Loan Agreement" means that certain Loan Agreement,
         dated as of June 30, 1997, between Goldman Sachs Mortgage Company, as
         Lender, and AAPOP 1, L.P., Atlantic American Land Development, Inc.,
         Iron Run Venture I and Iron Venture II as borrowers, as amended by (a)
         an Agreement and First Amendment to Loan Agreement and Note, dated as
         of August 8, 1997, (b) a Second Amendment to Loan Agreement, dated as
         of January 23, 1998, and (c) a Confirmation of Liability Agreement and
         Third Amendment to Loan Agreement dated as of September 28, 1998.

                  "Grande B Loan Agreement" means that certain Loan Agreement,
         dated as of June 30, 1997, between Goldman Sachs Mortgage Company, as
         lender, and Commonwealth Atlantic Operating Properties, Inc., as
         borrower, as assumed by Brandywine Grande B, L.P. and amended pursuant
         to an Assumption and Modification Agreement dated September 28, 1998,
         as further amended by a Second Amendment of Loan Agreement dated as of
         February 2, 2001 and as assumed by Brandywine Grande C, L.P. pursuant
         to a Loan Assumption and Ratification Agreement dated as of February 2,
         2001.

         3. Permitted Investments. The definition of "Permitted Investments" set
forth in Section 1.1 of the Credit Agreement is amended and restated in its
entirety to read as follows:

                  "Permitted Investments" means, subject in all cases to
         Sections 7.10, 7.15 and 8.5(b), Investments which are (a) cash or Cash
         Equivalents, (b) accounts receivable created, acquired or made in the
         ordinary course of business and payable or dischargeable in accordance
         with customary trade terms, (c) Investments by one Credit Party in
         another Credit Party, (d) the acquisition of new Properties; provided
         that the Credit Parties may not invest in undeveloped land in excess of
         5% of Total Assets, in the aggregate, except for such undeveloped land
         that is adjacent to or contiguous with other assets being acquired or
         assets already owned or if such land is part of a construction project
         approved by the Required Lenders, has all necessary local permits and
         approvals and construction will commence within six months of
         acquisition, (e) earnest money and similar deposits in respect of
         Properties made in the ordinary course of business, (f) Investments as
         of the Closing Date in Subsidiaries that own Properties subject to the
         Grande A Loan Agreement or the Grande B Loan Agreement, (g) in addition
         to the Investments in clause (f) above, Investments in Subsidiaries
         which are not Credit Parties and Investments in joint ventures (whether
         or not Subsidiaries) not to exceed, in the aggregate at any one time,
         15% of the Adjusted Total Assets and (h) Investments not otherwise
         described in or covered by the other subclauses of this definition
         including, without limitation, loans to officers, directors and
         employees and repurchases of its capital stock or shares of beneficial
         interest (including the repurchase of stock or shares of beneficial
         interest that is retired, cancelled or terminated) or other ownership





         interests (including options, warrants and stock appreciation rights)
         by a Borrower or any Subsidiary); provided that (i) such Investments
         pursuant to this clause (h) do not exceed, in the aggregate at any one
         time, 10% of Adjusted Total Assets and (ii) such Investments, together
         with the Investments referred to in the previous clause (g), do not
         exceed, in the aggregate at any one time, 20% of Adjusted Total Assets.

         4. Amendments and Waivers. Section 11.6(e) of the Credit Agreement is
amended by deleting the reference to "Section 11.20" set forth therein and
substituting "Section 11.19" in replacement thereof.

         5. Officer's Certificate. Part B of Schedule 2 to Exhibit 7.1(c) of the
Credit Agreement is amended by deleting the word "lesser" set forth therein and
substituting the word "greater" in replacement thereof.

         6. Ratification of Credit Agreement. The term "Credit Agreement" as
used in each of the Credit Documents shall hereafter mean the Credit Agreement
as amended by this Amendment. Except as herein specifically agreed, the Credit
Agreement is hereby ratified and confirmed and shall remain in full force and
effect according to its terms. The Credit Parties acknowledge and consent to the
modifications set forth herein and agree that this Amendment does not impair,
reduce or limit any of their obligations under the Credit Documents and that,
after the date hereof, this Amendment shall constitute a Credit Document.
Notwithstanding anything herein to the contrary and without limiting the
foregoing, (a) each of the Credit Parties reaffirms the liens and security
interests granted under the terms of the Credit Documents and (b) each of the
Guarantors reaffirms its guaranty obligations set forth in the Credit Agreement.

         7. Condition Precedent. The effectiveness of this Amendment is subject
to receipt by the Administrative Agent of copies of this Amendment duly executed
by the Credit Parties and by the Required Lenders.

         8. Authority/Enforceability. Each of the Credit Parties, the
Administrative Agent and the Lenders party hereto represents and warrants as
follows:

                  (a) It has taken all necessary action to authorize the
         execution, delivery and performance of this Amendment.

                  (b) This Amendment has been duly executed and delivered by
         such Person and constitutes such Person's legal, valid and binding
         obligations, enforceable in accordance with its terms, except as such
         enforceability may be subject to (i) bankruptcy, insolvency,
         reorganization, fraudulent conveyance or transfer, moratorium or
         similar laws affecting creditors' rights generally and (ii) general
         principles of equity (regardless of whether such enforceability is
         considered in a proceeding at law or in equity).

                  (c) No consent, approval, authorization or order of, or
         filing, registration or qualification with, any court or governmental
         authority or third party is required in connection with the execution,
         delivery or performance by such Person of this Amendment.




         9. Representation/No Default/Release. The Credit Parties represent and
warrant to the Lenders that (a) the representations and warranties of the Credit
Parties set forth in Section 6 of the Credit Agreement are true and correct as
of the date hereof (other than those representations and warranties that
expressly relate to an earlier date), (b) no event has occurred and is
continuing which constitutes a Default or an Event of Default and (c) they have
no claims, counterclaims, offsets, credits or defenses to their obligations
under the Credit Documents or, to the extent they have any, they are hereby
released in consideration of the Required Lenders entering into this Amendment.

         10. Counterparts/Telecopy. This Amendment may be executed in any number
of counterparts, each of which when so executed and delivered shall be an
original, but all of which shall constitute one and the same instrument.
Delivery of executed counterparts by telecopy shall be effective as an original
and shall constitute a representation that an original will be delivered.

         11. GOVERNING LAW. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE
PARTIES HEREUNDER SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS
OF THE STATE OF NORTH CAROLINA.



                  [remainder of page intentionally left blank]






         IN WITNESS WHEREOF, each of the parties hereto has caused a counterpart
of this Amendment to be duly executed and delivered and this Amendment shall be
effective as of the date first above written.

BORROWERS:           BRANDYWINE REALTY TRUST,
                     a Maryland real estate investment trust

                     By:
                        -----------------------------------------
                              Name: Gerard H. Sweeney
                              Title:   President and Chief Executive Officer


                     BRANDYWINE OPERATING PARTNERSHIP,
                     L.P., a Delaware limited partnership

                              By:   Brandywine Realty Trust, a Maryland
                                    real estate investment trust, its general
                                    partner


                                    By:
                                       ---------------------------------------
                                             Name:  Gerard H. Sweeney
                                             Title:  President and Chief
                                                      Executive Officer




                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT


GUARANTORS:      AAPOP 2, L.P., a Delaware limited partnership

                 By: Witmer Operating Partnership I, L.P., a Delaware limited
                     partnership, one of its general partners

                     By: Brandywine Witmer, L.L.C., a Pennsylvania limited
                         liability company, its general partner

                         By: Brandywine Operating Partnership, L.P., a
                             Delaware limited partnership, its sole
                             member

                             By: Brandywine Realty Trust, a
                                 Maryland real estate investment
                                 trust, its general partner

                 By: Brandywine Witmer, L.L.C., a Pennsylvania limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 BRANDYWINE AMBASSADOR, L.P., a Pennsylvania limited partnership

                 By: Brandywine Ambassador, L.L.C., a Pennsylvania limited
                     liability company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE CENTRAL, L.P., a Pennsylvania limited partnership

                 By: Brandywine F.C., L.P., a Pennsylvania limited  partnership,
                     its general partner

                     By: Brandywine F.C., L.L.C., a Pennsylvania limited
                         liability company, its general partner

                         By: Brandywine Operating Partnership, L.P., a
                             Delaware limited partnership, its sole
                             member

                             By: Brandywine Realty Trust, a
                                 Maryland real estate investment
                                 trust, its general partner


                 BRANDYWINE DOMINION, L.P., a Pennsylvania limited partnership

                 By: Brandywine Dominion, L.L.C., a Pennsylvania limited
                     liability company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT


                 BRANDYWINE F.C., L.P., a Pennsylvania limited partnership

                 By: Brandywine F.C., L.L.C., a Pennsylvania limited liability
                     company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner

                 BRANDYWINE GRANDE B, L.P., a Delaware limited partnership

                 By: Brandywine Grande B Corp., a Delaware corporation, its
                     general partner


                 BRANDYWINE I.S., L.P., a Pennsylvania limited partnership

                 By: Brandywine I.S., L.L.C., a Pennsylvania limited liability
                     company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE METROPLEX, L.P., a Pennsylvania limited partnership

                 By: Brandywine Metroplex, LLC, a Pennsylvania limited liability
                     company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 BRANDYWINE P.M., L.P., a Pennsylvania limited partnership

                 By: Brandywine P.M., L.L.C., a Pennsylvania limited liability
                     company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 BRANDYWINE TB FLORIG, L.P., a Pennsylvania limited partnership

                 By: Brandywine TB Florig, LLC, a Pennsylvania limited liability
                     company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE TB INN, L.P., a Pennsylvania limited partnership

                 By: Brandywine TB Inn, L.L.C., a Pennsylvania limited liability
                     company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 BRANDYWINE TB I, L.P., a Pennsylvania limited partnership

                 By: Brandywine TB I, L.L.C., a Pennsylvania limited liability
                     company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 BRANDYWINE TB II, L.P., a Pennsylvania limited partnership

                 By: Brandywine TB II, L.L.C., a Pennsylvania limited liability
                     company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE TB V, L.P., a Pennsylvania limited partnership

                 By: Brandywine TB V, L.L.C., a Pennsylvania limited liability
                     company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 BRANDYWINE TB VI, L.P., a Pennsylvania limited partnership

                 By: Brandywine TB VI, L.L.C., a Pennsylvania limited liability
                     company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE TB VIII, L.P., a Pennsylvania limited partnership

                 By: Brandywine TB VIII, L.L.C., a Pennsylvania limited
                     liability company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 C/N IRON RUN LIMITED PARTNERSHIP III, a Pennsylvania limited
                 partnership

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 C/N LEEDOM LIMITED PARTNERSHIP II, a
                 Pennsylvania limited partnership

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 C/N OAKLANDS LIMITED PARTNERSHIP I, a
                 Pennsylvania limited partnership

                 By: Witmer Operating Partnership I, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Witmer, L.L.C., a Pennsylvania limited
                         liability company, its general partner

                         By: Brandywine Operating Partnership, L.P., a
                             Delaware limited partnership, its sole
                             member

                             By: Brandywine Realty Trust, a
                                 Maryland real estate investment
                                 trust, its general partner


                 C/N OAKLANDS LIMITED PARTNERSHIP III, a Pennsylvania limited
                 partnership

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its general partner

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 E-TENANTS.COM HOLDING, L.P., a Pennsylvania limited partnership

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its general partner

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 FIFTEEN HORSHAM, L.P., a Pennsylvania limited partnership

                 By: Witmer Operating Partnership I, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Witmer, L.L.C., a Pennsylvania limited
                         liability company, its general partner

                         By: Brandywine Operating Partnership, L.P., a
                             Delaware limited partnership, its sole
                             member

                             By: Brandywine Realty Trust, a
                                 Maryland real estate investment
                                 trust, its general partner


                 IRON RUN LIMITED PARTNERSHIP V, a Pennsylvania limited
                 partnership

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner





                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT


                 LC/N HORSHAM LIMITED PARTNERSHIP, a Pennsylvania limited
                 partnership

                 By: Witmer Operating Partnership I, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Witmer, L.L.C., a Pennsylvania limited
                         liability company, its general partner

                         By: Brandywine Operating Partnership, L.P., a
                             Delaware limited partnership, its sole
                             member

                             By: Brandywine Realty Trust, a
                                 Maryland real estate investment
                                 trust, its general partner


                 LC/N KEITH VALLEY LIMITED PARTNERSHIP I, a Pennsylvania limited
                 partnership

                 By: Witmer Operating Partnership I, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Witmer, L.L.C., a Pennsylvania limited
                         liability company, its general partner

                         By: Brandywine Operating Partnership, L.P., a
                             Delaware limited partnership, its sole
                             member

                             By: Brandywine Realty Trust, a
                                 Maryland real estate investment
                                 trust, its general partner

                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT


                 NEWTECH III LIMITED PARTNERSHIP, a Pennsylvania limited
                 partnership

                 By: Witmer Operating Partnership I, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Witmer L.L.C., a Pennsylvania limited
                         liability company, its general partner

                         By: Brandywine Operating Partnership, L.P., a
                             Delaware limited partnership, its sole
                             member

                             By: Brandywine Realty Trust, a
                                 Maryland real estate investment
                                 trust, its general partner


                 NEWTECH IV LIMITED PARTNERSHIP, a Pennsylvania limited
                 partnership

                 By: Witmer Operating Partnership I, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Witmer, L.L.C., a Pennsylvania limited
                         liability company,  its general partner

                         By: Brandywine Operating Partnership, L.P., a
                             Delaware limited partnership, its sole
                             member

                             By: Brandywine Realty Trust, a
                                 Maryland real estate investment
                                 trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 NICHOLS LANSDALE LIMITED PARTNERSHIP III, a Pennsylvania
                 limited partnership

                 By: Witmer Operating Partnership I, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Witmer L.L.C., a Pennsylvania limited
                         liability company, its general partner

                         By: Brandywine Operating Partnership, L.P., a
                             Delaware limited partnership, its sole
                             member

                             By: Brandywine Realty Trust, a
                                 Maryland real estate investment
                                 trust, its general partner


                 WITMER OPERATING PARTNERSHIP I, L.P., a Delaware limited
                 partnership

                 By: Brandywine Witmer, L.L.C., a Pennsylvania limited liability
                     company, its general partner

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 100 ARRANDALE ASSOCIATES, L.P., a Pennsylvania limited
                 partnership

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 111 ARRANDALE ASSOCIATES, L.P., a Pennsylvania limited
                 partnership

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 440 CREAMERY WAY ASSOCIATES, L.P., a Pennsylvania limited
                 partnership

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 442 CREAMERY WAY ASSOCIATES, L.P., a Pennsylvania limited
                 partnership

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 481 JOHN YOUNG WAY ASSOCIATES, L.P., a Pennsylvania limited
                 partnership

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its general partner

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE 3 PARAGON DRIVE PARTNERSHIP, a New York general
                 partnership

                 By: Brandywine Axin I, LLC, a Delaware limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner

                 By: Brandywine Axin II, LLC, a Delaware limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE 55 AMES COURT PARTNERSHIP, a New York general
                 partnership

                 By: Brandywine Axin I, LLC, a Delaware limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner

                 By: Brandywine Axin II, LLC, a Delaware limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE ENGINEERS LANE PARTNERSHIP, a New York general
                 partnership

                 By: Brandywine Axin I, LLC, a Delaware limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner

                 By: Brandywine Axin II, LLC, a Delaware limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE NATIONAL ROAD PARTNERSHIP, a New York general
                 partnership

                 By: Brandywine Axin I, LLC, a Delaware limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner

                 By: Brandywine Axin II, LLC, a Delaware limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE PHILLIPS PARKWAY PARTNERSHIP, a New Jersey general
                 partnership

                 By: Brandywine Axin I, LLC, a Delaware limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner

                 By: Brandywine Axin II, LLC, a Delaware limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE BROAD STREET PARTNERSHIP, a New York general
                 partnership

                 By: Brandywine Axin I, LLC, a Delaware limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner

                 By: Brandywine Axin II, LLC, a Delaware limited liability
                     company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 BRANDYWINE REALTY PARTNERS, a Pennsylvania general partnership

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, one of its partners

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 INTERSTATE CENTER ASSOCIATES, a Virginia general partnership

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, one of its general partners

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner

                 By: Brandywine Interstate 50, L.L.C., a Delaware limited
                     liability company, one of its general partners

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real estate
                             investment trust, its general partner





                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT


                 IR NORTHLIGHT II ASSOCIATES, a Pennsylvania general partnership

                 By: AAPOP 2, L.P., a Delaware limited partnership, one of its
                     general partners

                     By: Witmer Operating Partnership I, L.P., a Delaware
                         limited partnership, one of its general partners

                         By: Brandywine Witmer, L.L.C., a Pennsylvania
                             limited liability company, its general
                             partner

                             By: Brandywine Operating Partnership,
                                 L.P., a Delaware limited
                                 partnership, its sole member

                                 By: Brandywine Realty Trust,
                                     a Maryland real estate
                                     investment trust, its
                                     general partner

                     By: Brandywine Witmer, L.L.C., a Pennsylvania limited
                         liability company, one of its general partners

                         By: Brandywine Operating Partnership, L.P., a
                             Delaware limited partnership, its sole
                             member

                             By: Brandywine Realty Trust, a
                                 Maryland real estate investment
                                 trust, its general partner

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, one of its general partners

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 PLYMOUTH TFC GENERAL PARTNERSHIP, a Pennsylvania general
                 partnership

                 By: Brandywine P.M., L.P., a Pennsylvania limited partnership,
                     one of its general partners

                     By: Brandywine P.M., L.L.C., a Pennsylvania limited
                         liability company, its general partner

                         By: Brandywine Operating Partnership, L.P., a
                             Delaware limited partnership, its sole
                             member

                             By: Brandywine Realty Trust, a
                                 Maryland real estate investment
                                 trust, its general partner

                 By: Whitmer Operating Partnership I, L.P., a Delaware limited
                     partnership, one of its general partners

                     By: Brandywine Witmer, L.L.C., a Pennsylvania limited
                         liability company, its general partner

                         By: Brandywine Operating Partnership, L.P., a
                             Delaware limited partnership, its sole
                             member

                             By: Brandywine Realty Trust, a
                                 Maryland real estate investment
                                 trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 AAP SUB TWO, INC., a Delaware corporation


                 BRANDYWINE GRANDE B CORP., a Delaware corporation


                 BTRS, INC., a Delaware corporation


                 SOUTHPOINT LAND HOLDINGS, INC., a Pennsylvania corporation


                 VALLEYBROOKE LAND HOLDINGS, INC., a Pennsylvania corporation


                 1100 BRANDYWINE, LLC, a Delaware limited liability company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE ACQUISITIONS, LLC, a Delaware limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE AMBASSADOR, L.L.C., a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE AXINN I, LLC, a Delaware limited liability company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE AXINN II, LLC, a Delaware limited liability company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE BROKERAGE SERVICES, LLC, a New Jersey limited
                 liability company

                 By: Brandywine Realty Services Corporation, a Pennsylvania
                     corporation, its sole member



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE CHARLOTTESVILLE LLC, a Virginia limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE CHESTNUT RIDGE, L.L.C., a New Jersey limited
                 liability company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, one of its members

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner

                 By: Brandywine Axinn I, LLC, a Delaware limited liability
                     company, one of its members

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 BRANDYWINE DABNEY, L.L.C., a Delaware limited liability company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE DOMINION, L.L.C., a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE F.C., L.L.C., a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE I.S., L.L.C., a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE INTERSTATE 50, L.L.C., a Delaware limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE LEASING, LLC, a Delaware limited liability company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE-MAIN STREET, LLC, a Delaware limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, one of its members

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner

                 By: Brandywine Acquisitions, LLC, a Delaware limited liability
                     company, one of its members

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its sole member

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 BRANDYWINE METROPLEX LLC, a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE P.M., L.L.C., a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE PIAZZA, L.L.C., a New Jersey limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE PLAZA 1000, L.L.C., a New Jersey limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE PROMENADE, L.L.C., a New Jersey limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE TB FLORIG, LLC, a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE TB INN, L.L.C., a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE TB I, L.L.C., a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE TB II, L.L.C., a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 BRANDYWINE TB V, L.L.C., a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE TB VI, L.L.C., a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE TB VIII, L.L.C., a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner


                 BRANDYWINE WITMER, L.L.C., a Pennsylvania limited liability
                 company

                 By: Brandywine Operating Partnership, L.P., a Delaware limited
                     partnership, its sole member

                     By: Brandywine Realty Trust, a Maryland real estate
                         investment trust, its general partner



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT

                 E-TENANTS.COM LLC, a Delaware limited liability company

                 By: e-Tenants.com Holding, L.P., a Pennsylvania limited
                     partnership, its sole member

                     By: Brandywine Operating Partnership, L.P., a Delaware
                         limited partnership, its general partner

                         By: Brandywine Realty Trust, a Maryland real
                             estate investment trust, its general
                             partner


                 By:
                    -----------------------------------------
                          Name: Gerard H. Sweeney
                          Title: President and Chief Executive Officer of
                                 each of the above-named entities




                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT




LENDERS:
                     BANK OF AMERICA, N.A., acting in its capacity
                     as Administrative Agent and individually as a Lender

                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     CITIBANK, N.A.


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     FLEET NATIONAL BANK


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT




                     COMMERZBANK AG NEW YORK AND GRAND
                     CAYMAN BRANCHES


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     PNC BANK, NATIONAL ASSOCIATION


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT




                     FIRST UNION NATIONAL BANK


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT




                     DRESDNER BANK AG, NEW YORK BRANCH AND
                     GRAND CAYMAN BRANCH


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     KEYBANK NATIONAL ASSOCIATION


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     ALLFIRST BANK


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     AMSOUTH BANK


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________


                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     CITIZENS BANK OF RHODE ISLAND


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     MELLON BANK, N.A.


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     SOUTHTRUST BANK


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     SOVEREIGN BANK


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     THE BANK OF NEW YORK


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT




                     COMERICA BANK


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT


                     FIRSTRUST BANK


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________



                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     NATIONAL CITY BANK OF PENNSYLVANIA


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________





                  CONSENT AND FIRST AMENDMENT TO THIRD AMENDED
                          AND RESTATED CREDIT AGREEMENT





                     U.S. BANK, N.A.


                     By:____________________________________
                     Name:__________________________________
                     Title:_________________________________