Subject Region
United States
926
Great Britain
353
Canada
62
Germany
52
France
49
England
43
Mexico
38
Spain
36
Ireland
35
Europe
30
India
25
Rome
22
European Union countries
21
Pennsylvania
20
Espana
19
Japan
18
Massachusetts
18
Latin America
17
Holy Roman Empire
16
Greece
15
China
14
Northern Ireland
13
Virginia
13
Turkey
12
Australia
11
Colombia
11
Europe, Eastern
11
North Carolina
11
Scotland
11
New York (State)
10
Poland
10
Soviet Union
10
Chile
9
Hungary
9
Athens
8
Iran
8
Italy
8
Austria
7
Ecuador
7
Portugal
7
Rhode Island
7
South Africa
7
Argentina
6
Illinois
6
Kenya
6
Norway
6
Alabama
5
Confederate States of America
5
Czech Republic
5
Hong Kong
5
more ...