The Historical Society of Pennsylvania’s Library will be closed Friday, July 3, 2015. Regular hours will resume on Tuesday, July 7. We apologize for any inconvenience. Happy Independence Day! 

A Center for History & Learning

We invite you to explore the origins and diversity of Pennsylvania and the United States, from the colonial period and the nation's founding to the experience of contemporary life. Conduct research in the online catalogs, browse our exhibits and publications, and join us in preserving and understanding our heritage as a diverse and dynamic people.