EXHIBIT 3.154 SECOND AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP OF BRANDYWINE MIDATLANTIC LP

                    THIS SECOND AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP of Brandywine Midatlantic LP (the “Partnership”) (formerly known as The Rubenstein Company, L.P.) is made and entered into as of this 21st day of September, 2004 by and between Brandywine Operating Partnership, L.P., a Delaware limited partnership as the sole limited partner (the “Limited Partner”) and Brandywine Midatlantic LLC, a Delaware limited liability company as sole general partner (the “General Partner” and together with the Limited Partner, the “Partners”)and amends and restates in its entirety the Amended and Restated Agreement of Limited Partnership of the Partnership dated as of the 3rd day of May, 2004 (the “Original Agreement”) among TRC Realty, Inc.-GP, as the sole general partner (the “Prior General partner”), and TRC Associates Limited Partnership and TRC-LB LLC as the sole limited partners (the “Prior Limited Partners).  Capitalized terms used herein as defined terms  are defined below.

                    By Certificate of Limited Partnership filed with the Secretary of State of the State of Delaware on December 22, 1997, The Rubenstein Company, L.P. was formed.  Immediately prior to the date hereof, the partners in the Partnership consisted of the Prior General Partner and the Prior Limited Partners.

                    On the date hereof, the Prior General Partner has transferred and assigned to the General Partner all of its right, title and interest in and to the Partnership (consisting of a .000392% interest as the sole general partner), and the Prior General Partner has withdrawn completely from the Partnership.  On the date hereof, TRC Associates Limited Partnership has transferred and assigned to the Limited Partner all of its right, title and interest in and to the Partnership (consisting of a 27.694114 % interest as a limited partner), and TRC Associates Limited Partnership has withdrawn completely from the Partnership.  On the date hereof, TRC-LB LLC has transferred and assigned to the Limited Partner all of its right, title and interest in and to the Partnership (consisting of a 72.305494 % interest as a limited partner), and TRC-LB LLC has withdrawn completely from the Partnership.

                    On the date hereof, an Amended and Restated Certificate of Limited Partnership was filed with the Secretary of State of the State of Delaware to reflect the change of the name of The Rubenstein Company, L.P. to Brandywine Midatlantic LP.

                    The General Partner and the Limited Partner desire to amend and restate in its entirety the Original Agreement as set forth herein.

                    NOW, THEREFORE, in consideration of the mutual promises and agreements herein made and intending to be legally bound, the Partners hereby agree as follows that the Original Agreement is amended and restated in its entirety to read as follows:

          1.1.     Continuation and Name .  The Partners hereby elect to continue the Partnership as a limited partnership pursuant to the provisions of the Act and under the name Brandywine Midatlantic LP.  The General Partner shall have authority to execute and cause to be filed such applications, elections, certificates and documents as may be necessary or appropriate

for the continuation of a limited partnership under the Act.  The business and affairs of the Partnership shall be conducted under the name set forth above or such other name as the General Partner from time to time select. 

          1.2.     Place of Business .  The principal place of business of the Partnership shall be at 401 Plymouth Road, Suite 500, Plymouth Meeting, PA  19462, or such other place as the General Partner may from time to time designate.  The Partnership may maintain such other offices at such other places as the General Partner deems advisable.

          1.3.     Purpose .  The Partnership is organized to pursue any lawful purpose.

          1.4.     Term .  The term of the Partnership has commenced and shall continue until the Partnership is terminated in accordance with the terms of this Agreement.

          2.1.     Initial Capital Contributions .  On the date hereof, the Partners shall be deemed to have contributed aggregate capital to the Partnership equal to the amount of the consideration payable under the Contribution Agreement dated as of August 18, 2004 that provided for the acquisition by the Partners of the Interests (with the amount of such capital allocated between the Partners in accordance with their respective Percentage Interests set forth on Exhibit A hereto).

          2.2.     Additional Capital Contributions or Loans .  No Partner shall be obligated or required to make any additional capital contributions or advance any funds to the Partnership unless all of the Partners unanimously agree to do so and unanimously agree as to the amount to be so contributed.

          2.3.     Allocations and Distributions .  All allocations of profits and losses and all distributions of cash shall be made in accordance with the Partners’ Percentage Interests, as set forth on Exhibit A hereto.  Distributions out of funds legally available therefor shall be made at such times as the General Partner determines.

          3.1.     Management and Control .  The General Partner shall manage and control the business and affairs of the Partnership and shall have all of the rights and powers which may be possessed by a general partner under the Act.  Except as otherwise provided in the Act, the General Partner shall make all decisions with respect to the business and affairs of the Partnership, and the Limited Partner shall have no right to participate in the management of the Partnership.

          4.1.     Restriction .  A Partner shall not, without the consent of the other Partner, make any Transfer of all or any portion of its Interest.

          4.2.     Transfer in Violation of Agreement .  Any purported Transfer of an Interest which is not made in compliance with this Agreement shall be null and void ab initio and of no force or effect whatsoever.

          5.1.     Records .  The Partnership shall maintain at its principal place of business:  (i) true and full information regarding the status of the business and financial affairs of the Partnership; (ii) a current list of the name and last known address of each of its Partners; (iii) a copy of this Agreement and all amendments thereto; (iv) the accounting books and records and minutes of proceedings of the Partners; and (v) any other information regarding the affairs of the Partnership as the General Partner determines is just and reasonable.

          5.2.     Fiscal Year .  Unless otherwise designated by the Partners, the fiscal year of