|Brandywine Realty Trust is a self-administered and self-managed real estate investment trust (REIT) that provides leasing, property management, development, redevelopment, acquisition and other tenant-related services for a portfolio of office, mixed-use and industrial properties. As of December 31, 2011, the Company owned 207 office properties collectively, the Properties), 20 industrial facilities and five mixed-use properties that contain an aggregate of approximately 25.2 million net rentable square feet. As of December 31, 2011, it also owned interests in 18 unconsolidated real estate ventures (collectively, the Real Estate Ventures), that owns properties that contain approximately 6.7 million net rentable square feet. In March 2012, the Company sold 268,240 square foot office building located in Herndon, Virginia. On June 22, 2012, the Company sold a two building office property totaling 121,381 square feet located in Carlsbad, California.