Region
Pennsylvania
121
United States
58
Great Britain
20
New Jersey
20
Puerto Rico
14
Germany
11
France
9
Rome
9
China
8
India
8
Europe
7
New York (State)
6
Rome (Empire)
6
Allemagne
5
Italy
5
Japan
5
Netherlands
5
Northampton County
5
England
4
Greece
4
Philadelphia
4
Africa
3
Allentown
3
Developing countries
3
Grande-Bretagne
3
Iran
3
Jamaica
3
Lehigh University
3
Pays-Bas
3
Turkey
3
Vermont
3
Afrique
2
Alaska
2
Austria
2
Bethlehem
2
Bucks County
2
Earth
2
Grèce
2
Iraq
2
Italie
2
Maryland
2
Massachusetts
2
Mexico
2
New Hampshire
2
New York Bight (N.J. and N.Y.)
2
New Zealand
2
Newfoundland
2
Patagonia (Argentina and Chile)
2
Philadelphia (Pa.)
2
South Island
2
more ...