William Penn's 1681 grant, expanded purchase by purchase up the Susquehanna to the Ohio.
All native title within the charter bounds was extinguished by 1792; a U.S. state from 1776.
The atlas holds 4 border frames for Pennsylvania — the shape you scrub through changes in 1681 · 1736 · 1754 · 1768.
A modern biography of the founder, covering the 1681 grant and the Quaker colony's design.
An older survey of Pennsylvania and the Quaker colonies of the Delaware (broad regional context).