Region
20th century
1
Alexandria (Va.)
1
Allegheny
9
Allegheny (Pittsburgh, Pa.)
9
Allegheny City
1
Allegheny City (Pa.)
1
Allegheny Co
16
Allegheny County
13
Allegheny County (Pa.)
46
Allegheny River (Pa. and N.Y.)
4
Allegheny River Valley (Pa. and N.Y.)
1
Allegheny, Pa
1
Allegheny, Pennsylvania
1
Apollo
1
Apollo (Pa.)
1
Armstrong County (Pa.)
1
Baltimore
3
Baltimore (Md.)
1
Berks County (Pa.)
2
Boston (Ma.)
1
Buffalo (N.Y.)
1
Camp High Point Park (N.J.)
1
Canada
2
Chicago
5
Chicago (Ill.)
5
Cleveland
2
Cleveland (Ohio)
2
Congregational
1
Cumberland County (Pa.)
1
Czechoslovakia
1
Davis Island Dam (Pa.)
1
Duquesne, Fort
2
East Liberty (Pittsburgh, Pa.)
1
Europe, Eastern
1
États-Unis
4
Fairmount Park (Philadelphia, Pa.)
1
Farrell (Pa.)
1
Fort Duquesne
4
Fort Duquesne (Pa.)
12
Fort Duquesne (Penns.)
2
Fort Duquesne (Pittsburgh, Penns.)
3
Fort Pitt
4
Fort Pitt (Pa.)
9
Fort Pitt (Penns.)
1
George Westinghouse Memorial Bridge (Pittsburgh, Pa.)
1
Germany
2
Hampton (Allegheny County, Pa.)
1
Hampton (Pa. : Township)
1
Hampton (Township)
1
High Point
1
more ...