Buildings, structures, etc History 56 Historic buildings 25 Buildings 23 Architecture 17 Hotels 17 Conservation and restoration 7 more ... Historic sites 7 Social life and customs 6 Statues 6 Railroads 5 Histoire 4 Homes and haunts 4 William Penn Statue (City Hall, Philadelphia, Pa.) 4 Architecture, Modern 3 Architecture, Victorian 3 Dwellings 3 Exhibitions 3 Mansions 3 Neighborhoods 3 Public buildings 3 Sculpture 3 Walking 3 Abandoned buildings 2 Architectural & Industrial 2 Architecture, Domestic 2 Art collections 2 Auditoriums 2 CHR 1789 2 Church history 2 Church schools 2 Criticism and interpretation 2 Design and construction 2 HISTORY 2 Historic houses, etc 2 Jews 2 Liberty Bell 2 Middle Atlantic (DC, DE, MD, NJ, NY, PA) 2 PHOTOGRAPHY 2 Prisons 2 less ...