<ARTICLE>                                5
<CIK>                                    0000790816
<NAME>                                   BRANDYWINE REALTY TRUST
<MULTIPLIER>                             1000

                                      
<PERIOD-TYPE>                            12-MOS
<FISCAL-YEAR-END>                        DEC-31-1999
<PERIOD-START>                           DEC-31-1998
<PERIOD-END>                             DEC-31-1999
<CASH>                                         5,692
<SECURITIES>                                       0
<RECEIVABLES>                                 25,893
<ALLOWANCES>                                       0
<INVENTORY>                                        0
<CURRENT-ASSETS>                              42,399
<PP&E>                                     1,828,097
<DEPRECIATION>                               125,744
<TOTAL-ASSETS>                             1,829,916
<CURRENT-LIABILITIES>                         54,924
<BONDS>                                      839,634
<PREFERRED-MANDATORY>                              0
<PREFERRED>                                        0
<COMMON>                                         364
<OTHER-SE>                                   656,187
<TOTAL-LIABILITY-AND-EQUITY>               1,829,916
<SALES>                                            0
<TOTAL-REVENUES>                             283,220
<CGS>                                              0
<TOTAL-COSTS>                                244,792
<OTHER-EXPENSES>                                   0
<LOSS-PROVISION>                                   0
<INTEREST-EXPENSE>                            66,659
<INCOME-PRETAX>                               34,606
<INCOME-TAX>                                       0
<INCOME-CONTINUING>                                0
<DISCONTINUED>                                     0
<EXTRAORDINARY>                                    0
<CHANGES>                                          0
<NET-INCOME>                                  34,606
<EPS-BASIC>                                    .80
<EPS-DILUTED>                                    .80