Greater Philadelphia GeoHistory Network
https://www.philageohistory.org/geohistory/
The purpose of the Greater Philadelphia GeoHistory Network is to gather geographic materials useful for the study of historic Philadelphia and its region.
- This site contains thousands of old maps, property atlases, city directories, industrial site surveys, and other items documenting the history and development of the city from the 1600s through today.
- The Greater Philadelphia GeoHistory Network (GPGN) is a pilot project of the Philadelphia Area Consortium of Special Collections Libraries (PACSCL) to develop a web-based repository of geographically organized historical information about Philadelphia, its geography, its buildings, and its people.