History 9 Memorials, monuments 9 Ancient history: to c 500 CE 5 Archaeology by period / region 5 Classical Greek & Roman archaeology 5 African history 4 Archaeology 4 Architecture: public, commercial and industrial buildings 4 History of architecture 4 Ancient religions & mythologies 3 Conservation and restoration. Preservation and restoration of architectural monuments 3 Cultural studies 3 Historic buildings 3 History of art 3 Research & information: general 3 Slovenia 3 monument 3 20th century history: c 1900 to c 2000 2 Air forces & warfare 2 Ancient World 2 Ancient history 2 Anthropology 2 Architecture 2 Art & design styles: c 1900 to c 1960 2 Asia 2 Asian history 2 Biology, life sciences 2 City & town planning - architectural aspects 2 Civil defence 2 Disability: social aspects 2