The depth and breadth of the Historical Society of Pennsylvania’s 20th-century collections is significant. These rich collections, dating up through the late 20th century, have both a regional and national scope. They document the greater Philadelphia area, national figures and organizations, as well as individuals and associations that had a nationwide impact. The experiences of diverse segments of society, including African Americans, women, and various ethnic and immigrant groups, are well represented.
The Historical Society of Pennsylvania's collections include a large number of resources that relate to German-speaking immigrants in Philadelphia and beyond, dating from the earliest colonists into the twentieth century. Resources include published materials, manuscript collections, newspapers and other periodicals, photographs, and other graphics.