Pennsylvania Real Estate Investment Trust (PREIT) is an integrated, self-managed and self-administered real estate investment trust (REIT). The Company primarily engaged in the ownership, management, leasing, development, redevelopment and acquisition of retail shopping malls and strip, and power centers. The Company has a primary investment focused on retail shopping malls and strip, and power centers located in the eastern half of the United States, primarily in the Mid-Atlantic region. As of December 31, 2010, the Company’s portfolio consisted of a total of 49 properties in 13 states, including 38 shopping malls, eight strip and power centers, and three properties under development. The operating retail properties have a total of approximately 33.2 million square feet. The development portion of its portfolio contains three properties in two states, with two classified as mixed use (a combination of retail and other uses), and one classified as other.