Region
Pennsylvania
13
Philadelphia
7
United States
4
Virginia
3
Berks County
2
Berks County (Pa.)
2
Hopewell Furnace National Historic Site (Pa.)
2
New Jersey
2
Pennsylvanie
2
Batsto (N.J.)
1
Berks (Comté)
1
Bethlehem
1
Bethlehem (Pa.)
1
Chester County
1
Frederick Co
1
Gloucester
1
Gloucester City
1
Hopewell Furnace National Historic Site
1
Hopewell Furnace National Historic Site (Penns.)
1
Indiana
1
King George Co
1
King George County (Va.)
1
Lancaster County (Pa.)
1
Lonaconing
1
Lonaconing (Md.)
1
Maryland
1
Massachusetts
1
Pine Grove Furnace (Pa.)
1
Pine Grove Iron Works
1
South Bend
1
South Bend (Ind.)
1