The neighborhood is named after the mansion that Andrew Carnegie built at Fifth Avenue and 91st Street in 1901. Today the mansion houses the Cooper Hewitt, Smithsonian Design Museum, a branch of the Smithsonian Institution. Facing it on 91st Street is the Otto H. Kahn House, a Florentine palazzo, now housing the Convent of the Sacred Heart. A number of other townhouses in the area have been converted to schools, including the recent purchase of the William Goadby and Florence Baker Loew House on 93rd Street by the Spence School. The Lycée Français, housed in the former Virginia Graham Fair Vanderbilt House, held an additional townhouse space on 93rd between Fifth and Madison Avenue until 2005, when the property was sold to a private owner.