Subject Region
United States
344
Great Britain
176
France
101
Europe
90
Greece
72
China
37
Rome
32
Germany
31
Mexico
24
Italy
23
India
20
Japan
19
Latin America
14
Spain
14
Argentina
13
Arab countries
12
Florence (Italy)
11
Islamic Empire
11
Espana
10
America Latina
8
England
8
Middle East
8
Scotland
8
Athens
7
Canada
7
Europe, Eastern
7
Russia
7
Europe, Central
6
Soviet Union
6
Australia
5
Austria
5
Netherlands
5
Africa
4
Chile
4
Europa
4
Grecia
4
Iraq
4
Islamic countries
4
Nigeria
4
Southern States
4
Syria
4
Bosnia and Herzegovina
3
Burma
3
Congo (Democratic Republic)
3
Cuba
3
Ireland
3
Mediterranean Region
3
Naples (Kingdom)
3
Philippines
3
Québec (Province)
3
more ...