Delaware County
Formed September 26, 1789 out of Chester County. Named for the Delaware River and site of William Penn's first entry into Pennsylvania, 1682. Old Chester Courthouse (1724) is one of America's early public buildings. County seat, Media, incorporated 1850.
Digital Commonwealth, Boston Public LibraryDavid Rumsey Map Collection, Stanford LibrariesPrinceton University LibraryJohn Carter Brown Library, Brown UniversityDavid Rumsey Map Collection, Stanford Libraries
Marker data: Pennsylvania Historical and Museum Commission via data.pa.gov
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