Buildings, structures, etc 135 History 67 Buildings 38 Historic buildings 33 Architecture 20 Hotels 20 Conservation and restoration 10 more ... Histoire 7 Historic sites 7 Social life and customs 7 Architecture, Domestic 6 Neighborhoods 6 Railroads 6 Statues 6 Historic houses, etc 5 Architectural & Industrial 4 Architecture, Victorian 4 Biography 4 Design and construction 4 HISTORY 4 Homes and haunts 4 Liberty Bell 4 Mansions 4 Middle Atlantic (DC, DE, MD, NJ, NY, PA) 4 PHOTOGRAPHY 4 State & Local 4 Subjects & Themes 4 William Penn Statue (City Hall, Philadelphia, Pa.) 4 Architecture, Modern 3 Auditoriums 3 Church schools 3 Dwellings 3 Exhibitions 3 Public buildings 3 Sculpture 3 Walking 3 ARCHITECTURE 2 Abandoned buildings 2 Apartment houses 2 Architects 2 less ...