About Keystone Building
The Keystone Building is a high-rise building located in downtown Boston, Massachusetts. The building stands at 400 feet (122 m) with 32 floors, and was completed in 1971. It is tied with Harbor Towers I as the 26th-tallest building in Boston. The architectural firm who designed the building was Emery Roth & Sons. The Keystone Building is notable for its distinctive rounded corners and grooved facade.