SUBJECT
Protection
Cultural property
145
Conservation and restoration
46
Free trade and protection
40
Historic sites
38
Antiquities
26
Historic preservation
23
Law and legislation
22
Electric power systems
20
Collection and preservation
18
Museums
14
Archaeology
13
Commercial policy
13
Moral and ethical aspects
12
Historic buildings
11
Social aspects
11
Management
10
Monuments
10
Tariff
10
World Heritage areas
10
Cultural policy
9
Excavations (Archaeology)
8
History
8
Protective relays
8
Art
7
Buildings
6
Environmental protection
6
Philosophy
6
Protection (International law)
6
Architecture
5
Archival materials
5
Civilization
5
Conservation of natural resources
5
Design and construction
5
Economic policy
5
Government policy
5
Indigenous peoples
5
Landscape protection
5
Legal status, laws, etc
5
Transients (Electricity)
5
Art thefts
4
Arts
4
Civil rights
4
Climatic changes
4
Economic aspects
4
Industries
4
International cooperation
4
Museum exhibits
4
Planning
4
Political aspects
4
more ...