Buildings, structures, etc History 60 Historic buildings 29 Buildings 26 Architecture 21 Hotels 19 Conservation and restoration 9 more ... Historic sites 7 Social life and customs 6 Statues 6 Homes and haunts 5 Railroads 5 Architecture, Domestic 4 Architecture, Victorian 4 Dwellings 4 Histoire 4 William Penn Statue (City Hall, Philadelphia, Pa.) 4 Architecture, Modern 3 Design and construction 3 Exhibitions 3 Historic houses, etc 3 Mansions 3 Neighborhoods 3 Public buildings 3 Sculpture 3 Walking 3 Abandoned buildings 2 Architectural & Industrial 2 Art collections 2 Auditoriums 2 Biography 2 Businesswomen 2 CHR 1789 2 Cemeteries 2 Church history 2 Church schools 2 Condominiums 2 Criticism and interpretation 2 Description and travel 2 HISTORY 2 less ...