) is a self-managed real estate investment trust (REIT) based in Boston, Massachusetts. Its primary focus is "Class A" office space which it acquires, develops, and manages in the major markets of Boston, New York City, Washington, D.C., and San Francisco. The company has acquired several high-value properties in these markets, including the General Motors Building in New York City for $2.8 billion, the highest paid for an American office building. It also owns two hotel properties. - Source: Wikipedia
