Historic buildings 123 History 37 Conservation and restoration 22 Description and travel 15 Architecture 12 Historic sites 4 Buildings, structures, etc 3 more ... Roads 3 Architecture, Colonial 2 Guidebooks 2 Pennsylvania Dutch 2 Pictorial works 2 338 Spruce Street (Philadelphia, Pa.) 1 American Revolution Bicentennial, 1976 1 Archaeology 1 Arsenals 1 Christmas 1 Church buildings 1 Convention facilities 1 Cookbooks 1 Cooking 1 Directories 1 Dwellings 1 Environmental impact analysis 1 Frankford Arsenal (Philadelphia, Pa.) 1 General stores 1 Germantown, Battle of, Philadelphia, Pa., 1777 1 Harriton House (Bryn Mawr, Pa.) 1 Historic preservation 1 Homes and haunts 1 Hotels 1 House furnishings 1 Legislators 1 Mints 1 National parks and reserves 1 Parks 1 Plantation life 1 Restaurants 1 Signs and signboards 1 Taverns (Inns) 1 less ...