EXHIBIT 99.1

                                  RISK FACTORS

         Our business is subject to various risks, including those described
below. You should carefully consider the following risks, together with all of
the other information included in this document and incorporated by reference
before deciding to invest in our securities. Any of these risks could materially
adversely affect our business, operating results and financial condition.

         OUR PERFORMANCE IS SUBJECT TO RISKS ASSOCIATED WITH OUR PROPERTIES AND
WITH THE REAL ESTATE INDUSTRY.

                  Our economic performance and the value of our real estate
assets, and consequently the value of our securities, are subject to the risk
that if our properties do not generate revenues sufficient to meet our operating
expenses, including debt service and capital expenditures, our cash flow and
ability to pay distributions to our shareholders will be adversely affected.
Events or conditions beyond our control that may adversely affect our operations
or the value of our properties include:

               o  downturns in the national, regional and local economic
                  climate;

               o  competition from other office, industrial and commercial
                  buildings;

               o  local real estate market conditions, such as oversupply or
                  reduction in demand for office, or other commercial or
                  industrial space;

               o  changes in interest rates and availability of financing;

               o  vacancies, changes in market rental rates and the need to
                  periodically repair, renovate and re-lease space;

               o  increased operating costs, including insurance expense,
                  utilities, real estate taxes, state and local taxes and
                  heightened security costs;

               o  civil disturbances, earthquakes and other natural disasters,
                  or terrorist acts or acts of war which may result in uninsured
                  or underinsured losses;

               o  significant expenditures associated with each investment, such
                  as debt service payments, real estate taxes, insurance and
                  maintenance costs which are generally not reduced when
                  circumstances cause a reduction in revenues from a property;
                  and

               o  declines in the financial condition of our tenants and our
                  ability to collect rents from our tenants.

         WE MAY EXPERIENCE INCREASED OPERATING COSTS, WHICH MIGHT REDUCE OUR
PROFITABILITY.

                  Our properties are subject to increases in operating expenses
such as for cleaning, electricity, heating, ventilation and air conditioning,
administrative costs and other costs associated with security, landscaping and
repairs and maintenance of our properties. In general, under our leases with
tenants, we pass on all or a portion of these costs to them. We cannot assure
you, however, that tenants will actually bear the full burden of these higher
costs, or that such increased costs will not lead them, or other prospective
tenants, to seek office space elsewhere. If operating expenses increase, the
availability of other comparable office space in our core geographic markets
might limit our ability to increase rents; if operating expenses increase
without a corresponding increase in revenues, our profitability could diminish
and limit our ability to make distributions to shareholders.


         OUR INVESTMENT IN PROPERTY DEVELOPMENT OR REDEVELOPMENT MAY BE MORE
COSTLY THAN WE ANTICIPATE.

                  We intend to continue to develop properties where market
conditions warrant such investment. Once made, these investments may not produce
results in accordance with our expectations. Risks associated with our
development and construction activities include:

               o  the unavailability of favorable financing alternatives in the
                  private and public debt markets;

               o  construction costs exceeding original estimates due to rising
                  interest rates and increases in the costs of materials and
                  labor;

               o  construction and lease-up delays resulting in increased debt
                  service, fixed expenses and construction or renovation costs;

               o  expenditure of funds and devotion of management's time to
                  projects that we do not complete;

               o  occupancy rates and rents at newly completed properties may
                  fluctuate depending on a number of factors, including market
                  and economic conditions, resulting in lower than projected
                  rental rates and a corresponding lower return on our
                  investment; and

               o  complications (including building moratoriums and anti-growth
                  legislation) in obtaining necessary zoning, occupancy and
                  other governmental permits.

         WE FACE RISKS ASSOCIATED WITH PROPERTY ACQUISITIONS.

                  We have in the past acquired, and intend in the future to
acquire, properties and portfolios of properties, including large portfolios,
such as the our acquisition of Prentiss Properties Trust, that would increase
our size and potentially alter our capital structure. Although we believe that
the acquisitions that we have completed in the past and that we expect to
undertake in the future have, and will, enhance our future financial
performance, the success of such transactions is subject to a number of factors,
including the risk that:

               o  we may not be able to obtain financing for acquisitions on
                  favorable terms;

               o  acquired properties may fail to perform as expected;

               o  the actual costs of repositioning or redeveloping acquired
                  properties may be higher than our estimates;

               o  acquired properties may be located in new markets where we may
                  have limited knowledge and understanding of the local economy,
                  an absence of business relationships in the area or
                  unfamiliarity with local governmental and permitting
                  procedures; and

               o  we may not be able to efficiently integrate acquired
                  properties, particularly portfolios of properties, into our
                  organization and to manage new properties in a way that allows
                  us to realize cost savings and synergies.


         ACQUIRED PROPERTIES MAY SUBJECT US TO UNKNOWN LIABILITIES.

                  Properties that we acquire may be subject to unknown
liabilities for which we would have no recourse, or only limited recourse, to
the former owners of such properties. As a result, if a liability were asserted
against us based upon ownership of an acquired property, we might be required to
pay significant sums to settle it, which could adversely affect our financial
results and cash flow. Unknown liabilities relating to acquired properties could
include:

               o  liabilities for clean-up of undisclosed environmental
                  contamination;

               o  claims by tenants, vendors or other persons arising on account
                  of actions or omissions of the former owners of the
                  properties; and

               o  liabilities incurred in the ordinary course of business.

         WE HAVE AGREED NOT TO SELL CERTAIN OF OUR PROPERTIES.

                  We have agreed not to sell several of our properties for
varying periods of time, in transactions that would trigger taxable income to
our former owners, and we may enter into similar arrangements as a part of
future property acquisitions. One of these tax protection agreements is with one
of our current trustees. These agreements generally provide that we may dispose
of the subject properties only in transactions that qualify as tax-free
exchanges under Section 1031 of the Internal Revenue Code or in other tax
deferred transactions. Such transactions can be difficult to complete and can
result in the property acquired in exchange for the disposed of property
inheriting the tax attributes (including tax protection covenants) of the
disposed of property. Violation of these tax protection agreements would impose
significant costs on us. As a result, we are restricted with respect to
decisions with respect to financing, encumbering, expanding or selling of these
properties.

         WE MAY BE UNABLE TO RENEW LEASES OR RE-LEASE SPACE AS LEASES EXPIRE.

                  If tenants do not renew their leases upon expiration, we may
be unable to re-lease the space. Even if the tenants do renew their leases or if
we can re-lease the space, the terms of renewal or re-leasing (including the
cost of required renovations) may be less favorable than current lease terms.
Certain leases grant the tenants an early termination right upon payment of a
termination penalty.

         WE FACE SIGNIFICANT COMPETITION FROM OTHER REAL ESTATE DEVELOPERS.

                  We compete with real estate developers, operators and
institutions for tenants and acquisition and development opportunities. Some of
these competitors have significantly greater financial resources than we have.
Such competition may reduce the number of suitable investment opportunities
offered to us, may interfere with our ability to attract and retain tenants and
may increase vacancies, which could result in increased supply and lower market
rental rates, reducing our bargaining leverage and adversely affecting our
ability to improve our operating leverage. In addition, some of our competitors
may be willing (because their properties may have vacancy rates higher than
those for our properties, to make space available at lower prices than available
space in our properties or for other reasons). We cannot assure you that this
competition will not adversely affect our cash flow and our ability to make
distributions to shareholders.



         CHANGES IN MARKET CONDITIONS INCLUDING CAPITALIZATION RATES APPLIED IN
REAL ESTATE ACQUISITIONS COULD IMPACT OUR ABILITY TO GROW THROUGH ACQUISITIONS.

                  We selectively pursue acquisitions in our core markets when
long-term yields make acquisitions attractive. We compete with numerous property
owners for the acquisition of real estate properties. Some of these competitors
may be willing to accept lower yields on their investments impacting our ability
to acquire real estate assets and thus limit our external growth. We cannot
assure you that this competition will not adversely affect our cash flow and our
ability to make distributions to shareholders.

         PROPERTY OWNERSHIP THROUGH JOINT VENTURES MAY LIMIT OUR ABILITY TO ACT
EXCLUSIVELY IN OUR INTEREST.

                  We develop and acquire properties in joint ventures with other
persons or entities when we believe circumstances warrant the use of such
structures. As of January 5, 2006, we had investments in ten unconsolidated real
estate ventures and four additional real estate ventures that are consolidated
in our financial statements. We could become engaged in a dispute with one or
more of our joint venture partners that might affect our ability to operate a
jointly-owned property. Moreover, our joint venture partners may, at any time,
have business, economic or other objectives that are inconsistent with our
objectives, including objectives that relate to the appropriate timing and terms
of any sale or refinancing of a property. In some instances, our joint venture
partners may have competing interests in our markets that could create conflicts
of interest. If the objectives of our joint venture partners are inconsistent
with our own objections, we will not be able to act exclusively in our
interests.

         BECAUSE REAL ESTATE IS ILLIQUID, WE MAY NOT BE ABLE TO SELL PROPERTIES
WHEN APPROPRIATE.

                  Real estate investments generally, and in particular large
office and industrial properties like those that we own, often cannot be sold
quickly. Consequently, we may not be able to alter our portfolio promptly in
response to changes in economic or other conditions. In addition, the Internal
Revenue Code limits our ability to sell properties that we have held for fewer
than four years without resulting in adverse consequences to our shareholders.
Furthermore, properties that we have developed and have owned for a significant
period of time or that we acquired in exchange for partnership interests in our
operating partnership often have a low tax basis. If we were to dispose of any
of these properties in a taxable transaction, we may be required under
provisions of the Internal Revenue Code applicable to REITs to distribute a
significant amount of the taxable gain to our shareholders and this could, in
turn, impact our cash flow. In some cases, tax protection agreements with third
parties will prevent us from selling certain properties in a taxable transaction
without incurring substantial costs. In addition, purchase options and rights of
first refusal held by tenants or partners in joint ventures may also limit our
ability to sell certain properties. All of these factors reduce our ability to
respond to changes in the performance of our investments and could adversely
affect our cash flow and ability to make distributions to shareholders as well
as the ability of someone to purchase us, even if a purchase were in our
shareholders' best interests.



         WE MAY SUFFER ADVERSE CONSEQUENCES DUE TO THE FINANCIAL DIFFICULTIES,
BANKRUPTCY OR INSOLVENCY OF OUR TENANTS.

                  If one or more of our tenants were to experience financial
difficulties, including bankruptcy, insolvency or a general downturn of
business, there could be an adverse effect on our financial performance and
distributions to shareholders. We cannot assure you that any tenant that files
for bankruptcy protection will continue to pay us rent. A bankruptcy filing by
or relating to one of our tenants or a lease guarantor would bar efforts by us
to collect pre-bankruptcy debts from that tenant or lease guarantor, or its
property, unless we receive an order permitting us to do so from the bankruptcy
court. In addition, we cannot evict a tenant solely because of bankruptcy. The
bankruptcy of a tenant or lease guarantor could delay our efforts to collect
past due balances under the relevant leases, and could ultimately preclude
collection of these sums. If a lease is assumed by the tenant in bankruptcy, all
pre-bankruptcy balances due under the lease must be paid to us in full. If,
however, a lease is rejected by a tenant in bankruptcy, we would have only a
general unsecured claim for damages. Any such unsecured claim would only be paid
to the extent that funds are available and only in the same percentage as is
paid to all other holders of unsecured claims. Restrictions under the bankruptcy
laws further limit the amount of any other claims that we can make if a lease is
rejected. As a result, it is likely that we would recover substantially less
than the full value of any such unsecured claims that we might hold.

         SOME POTENTIAL LOSSES ARE NOT COVERED BY INSURANCE.

                  We currently carry comprehensive liability, fire, extended
coverage and rental loss insurance on all of our properties. We believe the
policy specifications and insured limits of these policies are adequate and
appropriate. There are, however, types of losses, such as lease and other
contract claims and terrorism and acts of war, that generally are not insured.
We cannot assure you that we will be able to renew insurance coverage in an
adequate amount or at reasonable prices. In addition, insurance companies may no
longer offer coverage against certain types of losses, such as losses due to
terrorist acts and mold, or, if offered, these types of insurance may be
prohibitively expensive. Should an uninsured loss or a loss in excess of insured
limits occur, we could lose all or a portion of the capital we have invested in
a property, as well as the anticipated future revenue from the property. In such
an event, we might nevertheless remain obligated for any mortgage debt or other
financial obligations related to the property. We cannot assure you that
material losses in excess of insurance proceeds will not occur in the future. If
any of our properties were to experience a catastrophic loss, it could seriously
disrupt our operations, delay revenue and result in large expenses to repair or
rebuild the property. Such events could adversely affect our cash flow and
ability to make distributions to shareholders.

         TERRORIST ATTACKS AND OTHER ACTS OF VIOLENCE OR WAR MAY ADVERSELY
IMPACT OUR PERFORMANCE AND MAY AFFECT THE MARKETS ON WHICH OUR SECURITIES ARE
TRADED.

                  Terrorist attacks against our properties, or against the
United States or our interests, may negatively impact our operations and the
value of our securities. Attacks or armed conflicts could result in increased
operating costs; for example, it might cost more in the future for building
security, property/casualty and liability insurance, and property maintenance.
As a result of terrorist activities and other market conditions, the cost of
insurance coverage for our properties could also increase. We might not be able
to pass along the increased costs associated with such increased security
measures and insurance to our tenants, which could reduce our profitability and
cash flow. Furthermore, any terrorist attacks or armed conflicts could result in
increased volatility in or damage to the United States and worldwide financial
markets and economy. Such adverse economic conditions could affect the ability
of our tenants to pay rent and our costs of capitals, which could have a
negative impact on our results.


         OUR ABILITY TO MAKE DISTRIBUTIONS IS SUBJECT TO VARIOUS RISKS.

                  Historically, we have paid quarterly distributions to our
shareholders. Our ability to make distributions in the future will depend upon:

               o  the operational and financial performance of our properties;

               o  capital expenditures with respect to existing and newly
                  acquired properties;

               o  general and administrative costs associated with our operation
                  as a publicly-held REIT;

               o  the amount of, and the interest rates on, our debt; and

               o  the absence of significant expenditures relating to
                  environmental and other regulatory matters.

                  Certain of these matters are beyond our control and any
significant difference between our expectations and actual results could have a
material adverse effect on our cash flow and our ability to make distributions
to shareholders.

         CHANGES IN THE LAW MAY ADVERSELY AFFECT OUR CASH FLOW.

                  Because increases in income and service taxes are generally
not passed through to tenants under leases, such increases may adversely affect
our cash flow and ability to make expected distributions to shareholders. Our
properties are also subject to various regulatory requirements, such as those
relating to the environment, fire and safety. Our failure to comply with these
requirements could result in the imposition of fines and damage awards and
default under some of our tenant leases. Moreover, the costs to comply with any
new or different regulations could adversely affect our cash flow and our
ability to make distributions. Although we believe that our properties are in
material compliance with all such requirements, we cannot assure you that these
requirements will not change or that newly imposed requirements will not require
significant expenditures.

         THE TERMS AND COVENANTS RELATING TO OUR INDEBTEDNESS COULD ADVERSELY
IMPACT OUR ECONOMIC PERFORMANCE.

                  Like other real estate companies which incur debt, we are
subject to risks associated with debt financing, such as the insufficiency of
cash flow to meet required debt service payment obligations and the inability to
refinance existing indebtedness. If our debt cannot be paid, refinanced or
extended at maturity, in addition to our failure to repay our debt, we may not
be able to make distributions to shareholders at expected levels or at all.
Furthermore, an increase in our interest expense could adversely affect our cash
flow and ability to make distributions to shareholders. If we do not meet our
debt service obligations, any properties securing such indebtedness could be
foreclosed on, which would have a material adverse effect on our cash flow and
ability to make distributions and, depending on the number of properties
foreclosed on, could threaten our continued viability.



                  Our credit facilities and the indenture governing our
unsecured public debt securities contain (and any new or amended facility will
contain) customary restrictions, requirements and other limitations on our
ability to incur indebtedness, including total debt to asset ratios, secured
debt to total asset ratios, debt service coverage ratios and minimum ratios of
unencumbered assets to unsecured debt which we must maintain. Our ability to
borrow under our credit facilities is (and any new or amended facility will be)
subject to compliance with such financial and other covenants. In the event that
we fail to satisfy these covenants, we would be in default under the credit
facilities and indenture and may be required to repay such debt with capital
from other sources. Under such circumstances, other sources of capital may not
be available to us, or may be available only on unattractive terms.

                  Increases in interest rates on variable rate indebtedness
would increase our interest expense, which could adversely affect our cash flow
and ability to make distributions to shareholders. Rising interest rates could
also restrict our ability to refinance existing debt when it matures. In
addition, an increase in interest rates could decrease the amounts that third
parties are willing to pay for our assets, thereby limiting our ability to alter
our portfolio promptly in relation to economic or other conditions. We have
entered into and may, from time to time, enter into agreements such as interest
rate hedges, swaps, floors, caps and other interest rate hedging contracts with
respect to a portion of our variable rate debt. Although these agreements may
lessen the impact of rising interest rates on us, they also expose us to the
risk that other parties to the agreements will not perform or that we cannot
enforce the agreements.

         OUR DEGREE OF LEVERAGE COULD LIMIT OUR ABILITY TO OBTAIN ADDITIONAL
FINANCING OR AFFECT THE MARKET PRICE OF OUR EQUITY SHARES OR DEBT SECURITIES.

                  Our degree of leverage could affect our ability to obtain
additional financing for working capital expenditures, development, acquisitions
or other general corporate purposes. Our senior unsecured debt is currently
rated investment grade by the three major rating agencies. We cannot, however,
assure you that we will be able to maintain this rating. In the event that our
unsecured debt is downgraded from the current rating, we would likely incur
higher borrowing costs and the market prices of our common shares and debt
securities might decline. Our degree of leverage could also make us more
vulnerable to a downturn in business or the economy generally.

         ADDITIONAL ISSUANCES OF EQUITY SECURITIES MAY BE DILUTIVE TO
SHAREHOLDERS.

                  The interests of our shareholders could be diluted if we issue
additional equity securities to finance future developments or acquisitions or
to repay indebtedness. Our board of trustees may issue additional equity
securities without shareholder approval. Our ability to execute our business
strategy depends upon our access to an appropriate blend of debt financing,
including unsecured lines of credit and other forms of secured and unsecured
debt, and equity financing, including the issuance of common and preferred
equity.



         POTENTIAL LIABILITY FOR ENVIRONMENTAL CONTAMINATION COULD RESULT IN
SUBSTANTIAL COSTS.

                  Under various federal, state and local laws, ordinances and
regulations, we may be liable for the costs to investigate and remove or
remediate hazardous or toxic substances on or in our properties, often
regardless of whether we know of or are responsible for the presence of these
substances. These costs may be substantial. Also, if hazardous or toxic
substances are present on a property, or if we fail to properly remediate such
substances, our ability to sell or rent the property or to borrow using that
property as collateral may be adversely affected.

                  Additionally, we develop, manage, lease and/or operate various
properties for third parties. Consequently, we may be considered to have been or
to be an operator of these properties and, therefore, potentially liable for
removal or remediation costs or other potential costs that could relate to
hazardous or toxic substances.

         AMERICANS WITH DISABILITIES ACT COMPLIANCE COULD BE COSTLY.

                  The Americans with Disabilities Act of 1990 ("ADA") requires
that all public accommodations and commercial facilities, including office
buildings, meet certain federal requirements related to access and use by
disabled persons. Compliance with ADA requirements could involve the removal of
structural barriers from certain disabled persons' entrances which could
adversely affect our financial condition and results of operations. Other
federal, state and local laws may require modifications to or restrict further
renovations of our properties with respect to such accesses. Although we believe
that our properties are in material compliance with present requirements,
noncompliance with the ADA or similar or related laws or regulations could
result in the United States government imposing fines or private litigants being
awarded damages against us. In addition, changes to existing requirements or
enactments of new requirements could require significant expenditures. Such
costs may adversely affect our cash flow and ability to make distributions to
shareholders.

         OUR STATUS AS A REIT (OR ANY OF OUT REIT SUBSIDIARIES) IS DEPENDENT ON
COMPLIANCE WITH FEDERAL INCOME TAX REQUIREMENTS.

                  If we (or any of our REIT subsidiaries) fails to qualify as a
REIT, we or the affected REIT subsidiary would be subject to federal income tax
at regular corporate rates. Also, unless the IRS granted us or our affected REIT
subsidiary, as the case may be, relief under certain statutory provisions, we or
it would remain disqualified as a REIT for four years following the year it
first failed to qualify. If we or any of our REIT subsidiaries fails to qualify
as a REIT, we or it would be required to pay significant income taxes and would,
therefore, have less money available for investments or for distributions to
shareholders. This would likely have a material adverse effect on the value of
the combined company's securities. In addition, we or our affected REIT
subsidiary would no longer be required to make any distributions to
shareholders.

                  Failure of Brandywine Operating Partnership (or a subsidiary
partnership) to be treated as a partnership would have serious adverse
consequences to our shareholders. If the IRS were to successfully challenge the
tax status of Brandywine Operating Partnership or any of its subsidiary
partnerships for federal income tax purposes, Brandywine Operating Partnership
or the affected subsidiary partnership would be taxable as a corporation. In
such event we would cease to qualify as a REIT and the imposition of a corporate
tax on Brandywine Operating Partnership or a subsidiary partnership would reduce
the amount of cash available for distribution from Brandywine Operating
Partnership to us and ultimately to our shareholders.



                  Even if we qualify as a REIT, we will be required to pay
certain federal, state and local taxes on our income and properties. In
addition, our taxable REIT subsidiaries will be subject to federal, state and
local income tax at regular corporate rates on their net taxable income derived
from management, leasing and related service business. If the we have net income
from a prohibited transaction, such income will be subject to a 100% tax.

         WE ARE DEPENDENT UPON OUR KEY PERSONNEL.

                  We are dependent upon our key personnel whose continued
service is not guaranteed. We are dependent on our executive officers for
strategic business direction and real estate experience. In connection with the
acquisition of Prentiss Properties Trust, we entered into employment agreements
with several former officers of Prentiss. Although we believe that we could find
replacements for these key personnel (including the former Prentiss officers),
loss of their services could adversely affect our operations.

                  Although we have an employment agreement with Gerard H.
Sweeney, our President and Chief Executive Officer, for a term extending to May
7, 2008, this agreement does not restrict his ability to become employed by a
competitor following the termination of his employment. We do not have key man
life insurance coverage on our executive officers.

         CERTAIN LIMITATIONS WILL EXIST WITH RESPECT TO A THIRD PARTY'S ABILITY
TO ACQUIRE US OR EFFECTUATE A CHANGE IN CONTROL.

                  Limitations imposed to protect our REIT status. In order to
protect us against the loss of our REIT status, our Declaration of Trust limits
any shareholder from owning more than 9.8% in value of our outstanding shares,
subject to certain exceptions. The ownership limit may have the effect of
precluding acquisition of control of us. If anyone acquires shares in excess of
the ownership limit, we may:

               o  consider the transfer to be null and void;

               o  not reflect the transaction on our books;

               o  institute legal action to stop the transaction;

               o  not pay dividends or other distributions with respect to those
                  shares;

               o  not recognize any voting rights for those shares; and

               o  consider the shares held in trust for the benefit of a person
                  to whom such shares may be transferred.

                  Limitation due to our ability to issue preferred shares. Our
Declaration of Trust authorizes the board of trustees to cause us to issue
preferred shares, without limitation as to amount. The board of trustees is able
establish the preferences and rights of any preferred shares issued which could
have the effect of delaying or preventing someone from taking control of us,
even if a change in control were in our shareholders' best interests.


                  Limitation imposed by the Maryland Business Combination Law.
The Maryland General Corporation Law, as applicable to Maryland REITs,
establishes special restrictions against "business combinations" between a
Maryland REIT and "interested shareholders" or their affiliates unless an
exemption is applicable. An interested shareholder includes a person who
beneficially owns, and an affiliate or associate of the trust who, at any time
within the two-year period prior to the date in question, was the beneficial
owner of, ten percent or more of the voting power of our then-outstanding voting
shares. Among other things, Maryland law prohibits (for a period of five years)
a merger and certain other transactions between a Maryland REIT and an
interested shareholder unless the board of trustees had approved the transaction
before the party became an interested shareholder. The five-year period runs
from the most recent date on which the interested shareholder became an
interested shareholder. Thereafter, any such business combination must be
recommended by the board of trustees and approved by two super-majority
shareholder votes unless, among other conditions, the common shareholders
receive a minimum price for their shares and the consideration is received in
cash or in the same form as previously paid by the interested shareholder for
our shares or unless the board of trustees approved the transaction before the
party in question became an interested shareholder. The business combination
statute could have the effect of discouraging offers to acquire us and of
increasing the difficulty of consummating any such offers, even if the
acquisition would be in our shareholders' best interests.

                  Maryland Control Share Acquisition Act. Maryland law provides
that "control shares" of a REIT acquired in a "control share acquisition" shall
have no voting rights except to the extent approved by a vote of two-thirds of
the vote eligible to be cast on the matter under the Maryland Control Share
Acquisition Act. "Control Shares" means shares that, if aggregated with all
other shares previously acquired by the acquirer or in respect of which the
acquirer is able to exercise or direct the exercise of voting power (except
solely by virtue of a revocable proxy), would entitle the acquirer to exercise
voting power in electing trustees within one of the following ranges of voting
power: one-tenth or more but less than one-third, one-third or more but less
than a majority or a majority or more of all voting power. Control shares do not
include shares the acquiring person is then entitled to vote as a result of
having previously obtained shareholder approval. A "control share acquisition"
means the acquisition of control shares, subject to certain exceptions. If
voting rights or control shares acquired in a control share acquisition are not
approved at a shareholder's meeting, then subject to certain conditions and
limitations the issuer may redeem any or all of the control shares for fair
value. If voting rights of such control shares are approved at a shareholder's
meeting and the acquirer becomes entitled to vote a majority of the shares
entitled to vote, all other shareholders may exercise appraisal rights. Any
control shares acquired in a control share acquisition which are not exempt
under our Bylaws are subject to the Maryland Control Share Acquisition Act. Our
Bylaws contain a provision exempting from the control share acquisition statute
any and all acquisitions by any person of our shares. We cannot assure you that
this provision will not be amended or eliminated at any time in the future.



         MANY FACTORS CAN HAVE AN ADVERSE EFFECT ON THE MARKET VALUE OF OUR
SECURITIES.

                  A number of factors might adversely affect the price of our
securities, many of which are beyond our control. These factors include:

               o  increases in market interest rates, relative to the dividend
                  yield on our shares. If market interest rates go up,
                  prospective purchasers of our securities may require a higher
                  yield. Higher market interest rates would not, however, result
                  in more funds for us to distribute and, to the contrary, would
                  likely increase our borrowing costs and potentially decrease
                  funds available for distribution. Thus, higher market interest
                  rates could cause the market price of our common shares to go
                  down;

               o  anticipated benefit of an investment in our securities as
                  compared to investment in securities of companies in other
                  industries (including benefits associated with tax treatment
                  of dividends and distributions);

               o  perception by market professionals of REITs generally and
                  REITs comparable to us in particular;

               o  level of institutional investor interest in our securities;

               o  relatively low trading volumes in securities of REITs;

               o  our results of operations and financial condition; and

               o  investor confidence in the stock market generally.

                  The market value of our common shares is based primarily upon
the market's perception of our growth potential and our current and potential
future earnings and cash distributions. Consequently, our common shares may
trade at prices that are higher or lower than our net asset value per common
share. If our future earnings or cash distributions are less than expected, it
is likely that the market price of our common shares will diminish.

         THE ISSUANCE OF PREFERRED SECURITIES MAY ADVERSELY AFFECT THE RIGHTS OF
HOLDERS OF OUR COMMON SHARES.

                  Because our board of trustees has the power to establish the
preferences and rights of each class or series of preferred shares, we may
afford the holders in any series or class of preferred shares preferences,
distributions, powers and rights, voting or otherwise, senior to the rights of
holders of common shares. Our board of trustees also has the power to establish
the preferences and rights of each class or series of units in Brandywine
Operating Partnership, and may afford the holders in any series or class of
preferred units preferences, distributions, powers and rights, voting or
otherwise, senior to the rights of holders of common units.

         THE ACQUISITION OF NEW PROPERTIES WHICH LACK OPERATING HISTORY WITH US
WILL GIVE RISE TO DIFFICULTIES IN PREDICTING REVENUE POTENTIAL.

                  We will continue to acquire additional properties. These
acquisitions could fail to perform in accordance with expectations. If we fail
to accurately estimate occupancy levels, operating costs or costs of
improvements to bring an acquired property up to the standards established for
our intended market position, the performance of the property may be below
expectations. Acquired properties may have characteristics or deficiencies
affecting their valuation or revenue potential that we have not yet discovered.
We cannot assure you that the performance of properties acquired by us will
increase or be maintained under our management.


         OUR PERFORMANCE IS DEPENDENT UPON THE ECONOMIC CONDITIONS OF THE
MARKETS IN WHICH OUR PROPERTIES ARE LOCATED.

                  Our properties are located in the Mid-Atlantic, Southwest,
Northern California and Southern California markets. Like other real estate
markets, these commercial real estate markets have experienced economic
downturns in the past, and future declines in any of these economies or real
estate markets could adversely affect cash available for distribution. Our
financial performance and ability to make distributions to our shareholders will
be particularly sensitive to the economic conditions in these markets. The local
economic climate, which may be adversely impacted by business layoffs or
downsizing, industry slowdowns, changing demographics and other factors, and
local real estate conditions, such as oversupply of or reduced demand for
office, industrial and other competing commercial properties, may affect
revenues and the value of properties, including properties to be acquired or
developed. We cannot assure you that these local economies will grow in the
future.