Category:History of Allegheny County, Pennsylvania
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- History of Pittsburgh (12 C, 124 P)
Pages in category "History of Allegheny County, Pennsylvania"
The following 43 pages are in this category, out of 43 total. This list may not reflect recent changes.
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- List of Pennsylvania state historical markers in Allegheny County
- Pittsburgh and Castle Shannon Plane
- Pittsburgh and Beck's Run Railroad
- Pittsburgh and Castle Shannon Railroad
- Pittsburgh Coal Company
- Pittsburgh Southern Railway
- Pittsburgh Steam Engine Company
- Pittsburgh, Virginia and Charleston Railway
- Pittsburgh and Western Railroad