| Keystone Building | |
| Location: | 99 High Street, Boston, Massachusetts |
| Coordinates: | 42.3542°N -71.0544°W |
| Roof: | 400feet |
| Floor Count: | 32 |
| Completion Date: | 1971 |
| Building Type: | Office |
| Architect: | Pietro Belluschi with Emery Roth & Sons |
| Developer: | Daniel Rose (for Rose Associates) |
| Website: | http://99highboston.com/ |
99 High Street, previously known as the Keystone Building, is a high-rise office building located in downtown Boston, Massachusetts.[1] The building stands at 400 feet (122 m) with 32 floors. Construction began in 1969[2] and was completed in 1971. In height, it is tied with Harbor Towers I as the 37th-tallest building in Boston. The building was the first development in Boston of the New York–based real estate firm Rose Associates, led by Daniel Rose,[3] who went on to develop One Financial Center and Boston Wharf. The original owners were Rose Associates (New York), Central & District Properties (London), and anchor tenant Keystone Custodial Funds. The building is currently owned by TIAA-CREF.[1]
The Keystone Building was developed as the flagship headquarters for Keystone (which was subsequently acquired and rebranded by Wells Fargo). To that end, Rose engaged architect Pietro Belluschi, a leader of the Modern Movement in architecture, to design the building's notable exterior, featuring distinctive rounded corners and grooved façade. Belluschi worked with the architectural firm of Emery Roth & Sons, who developed the construction drawings and interiors.[4]