Oxon Hill Manor
 Oxon Hill Manor is a neo-Georgian house of 49 rooms located at Oxon Hill Prince George's County Maryland. It was designed in 1928 for Sumner Welles (1892-1961) by the Washington architect Jules Henri de Sibour (1872-1938). It was built in 1929 and consists of a two-story main block of Flemish bond brick and a northern wing. Also on the property are two outbuildings contemporary with the house; a five-car garage and attached manager's quarters and greenhouse and a stable.