Historic sites History 326 Law and legislation 150 Conservation and restoration 147 Historic buildings 126 Lieux historiques 126 Antiquities 124 more ... History, Local 101 Cultural property 76 National parks and reserves 71 Historic preservation 70 Protection 60 Description and travel 58 Social aspects 55 Histoire 54 Monuments 54 Architecture 49 Excavations (Archaeology) 47 Buildings, structures, etc 43 Conservation et restauration 42 Battlefields 41 Guidebooks 41 Boundaries 32 Archaeology 30 Interpretive programs 30 Archaeology and history 29 Collection and preservation 29 African Americans 28 Museums 27 Travel 26 less ...