APS buildings are open to staff and invited guests. The Library is undergoing a renovation project that will make many collections inaccessible. It is expected to be completed in early 2022. 

Search the Collections

November 2021 Technology Update: To ensure the long-term accessibility of our digital collections, we are doing a major upgrade to our technological infrastructure. We are working to restore service as quickly as possible, but access to some services including the Digital Library has been interrupted. If you need immediate assistance with the APS's Library & Museum collections, please contact reference@amphilsoc.org and we will do our best to help. We apologize for the inconvenience.

Use the American Philosophical Society's online guides and search portals to access information along with selected images and documents from our manuscripts, printed materials, graphics, Digital Library, and Museum collections.