402 years in pictures
Summerseat is a National Historic Landmark, the National Register’s top tier. Its founding year, 1624, is the earliest of any Pennsylvania town we grade.
Census counts: 266 in 1810, 9,809 in 2020. The archive holds 12 old photos and papers going back to 1802 and 3 maps from 1947 on.
3 places on the National Register of Historic Places.
- 1624Morrisville is settled













