The Schwenkfelder Library and Heritage Center in Pennsburg, Pennsylvania, preserves the history of the Schwenkfelders as well as the wider story of southeastern Pennsylvania and the Perkiomen Valley through its museum, archive, and historical library collections. Beginning in 1885 as a private effort to gather materials, especially the writings of Kaspar Schwenkfeld von Ossig, it grew into a formal institution with notable holdings in Schwenkfelder fraktur, manuscripts, church and cemetery records, newspapers, genealogies, and objects of immigration and everyday life. Its collections also supported major scholarship on Schwenkfeld and continued to expand through the twentieth century and into the twenty-first.