EntityQ7754672· pop 5· linked from 516 articlesThe Octagon HouseSign in to savehistoric house in Washington, D.C.ConnectionsGeorgetownEntityWilliam ThorntonEntitySt. John's Episcopal ChurchEntityUnited StatesCountryChinaCountryEnglandEntityNew York CityCityWashington, D.C.EntityGeorge WashingtonPersonNew YorkEntityThomas JeffersonEntityPhiladelphiaEntitygeographic coordinate systemEntityJames MadisonEntityInternational Standard Book NumberEntityBritish EmpireEntityBaltimoreEntityAge of EnlightenmentEntityJames MonroeEntitypoliticianEntityCategories1799 establishments in Washington, D.C.Buildings and structures in Foggy BottomFederal architecture in Washington, D.C.Historic American Buildings Survey in Washington, D.C.Historic house museums in Washington, D.C.Homes of United States Founding FathersHouses completed in 1799Houses on the National Register of Historic Places in Washington, D.C.James MadisonNational Historic Landmarks in Washington, D.C.