Their original architects unknown, both the Ames-Webster and Hollis Hunnewell houses were enlarged and enriched, to similar effect, by John Hubbard Sturgis (at the latter house in partnership with Charles Brigham). The massing of the Hunnewell House is particularly successful, as it rises from a single-story wing at the corner of the alley to fully three stories below a steep mansard at the corner of Marlborough Street. The projecting entrance vestibule is unusual for its concave corners and oeil-de-boeuf transom. The enormous red brick and brownstone Ames-Webster House, expanded by the construction of a four-story pavilion topped by mansard roof and ornamented with bas-relief panels and a ribbed chimney, retains its original porte-cochère and conservatory. Carefully converted for office use as an early adaptive reuse project, the interiors are astonishingly magnificent, including a mural by Benjamin Constant and stained glass by John La Farge.