Otis (Harrison Gray) House (second) is built.

Architect: Charles Bulfinch. Designed in the Federal style, it is located at today’s 85 Mount Vernon Street. The first house built on the north side of Mount Vernon Street and one of the only freestanding mansions remaining on Beacon Hill today, it is occupied by Otis only until 1806. Subsequent occupants include Richard L. Sears, the Pratt sisters, and Evelyn Sears. An addition by Hartwell & Richardson is built in 1882. A private residence, its exterior was used as the fictional residence for the eponymous hero in the 1968 movie The Thomas Crown Affair.