Category:1780s maps of Allegheny County, Pennsylvania

Counties of Pennsylvania : Allegheny · Delaware · Philadelphia ·

Maps of Allegheny County, Pennsylvania by decade: ◀ · 1700s · 1710s · 1720s · 1730s · 1740s · 1750s · 1760s · 1770s · 1780s · 1790s · ▶

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1780 maps of Allegheny County, Pennsylvania‎ (2 F)

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