Shackamaxon
1682 CE.
Shown on the map at 39.966°, -75.129°.
The Treaty of Shackamaxon, also called the Great Treaty and Penn's Treaty, was a treaty between William Penn and Tamanend of the Lenape signed in 1682. The treaty created peace between the Quakers and Lenape, with Tamanend saying the two would "live in peace as long as the waters [ran] in the rivers and creeks and as long as the stars and moon [endured]."
Text from the Wikipedia article Treaty of Shackamaxon, licensed CC BY-SA 4.0.