Region
États-Unis
4
United States
4
Angleterre
3
Canada
3
England
3
Norvège
3
Norway
3
Ouvrages avant 1800
2
Pennsylvania
2
Pennsylvanie
2
America
1
Delaware
1
Delaware River Valley
1
Delaware River Valley (N.Y.-Del. and N.J.)
1
Delaware, Vallée de la (N.Y.-Del. et N.J.)
1
Maryland
1
New Jersey
1
New Sweden
1
Nordamerika
1
Sweden
1
Western Hemisphere
1