Category:History of Allegheny County, Pennsylvania
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This category has only the following subcategory.
- ► History of Pittsburgh (11 C, 117 P)
Pages in category "History of Allegheny County, Pennsylvania"
The following 42 pages are in this category, out of 42 total. This list may not reflect recent changes (learn more).
- 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