Historic sites Cultural property 6 Historic preservation 5 History 4 Historic buildings 3 Antiquities 2 Conservation and restoration 2 Ecology 2 Ethnicity 2 Landscape ecology 2 Landscapes 2 National characteristics 2 Restoration ecology 2 Slave trade 2 Archaeology 1 Cities and towns 1 Civilization 1 Collection and preservation 1 Cultural policy 1 Description and travel 1 Excavations (Archaeology) 1 Folklore 1 Government policy 1 Heritage tourism 1 Historic sites-Conservation and restoration 1 History, Local 1 Landscape protection 1 Law and legislation 1 Management 1 Material culture 1