Fort Mifflin
Laid out in 1771 by the engineer John Montresor. Heroically held by the Americans under British siege until they were forced out, Nov. 15, 1777. Rebuilt 1798-1800 according to L'Enfant's design and enlarged in the 19th century. A U.S. military post until the 1950s.
Digital Commonwealth, Boston Public LibraryDigital Commonwealth, Boston Public LibraryDigital Commonwealth, Boston Public LibraryDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford Libraries
Marker data: Pennsylvania Historical and Museum Commission via data.pa.gov
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