With over 70,000 German language books, pamphlets and manuscripts, the Joseph Horner Memorial Library of the German Society of Pennsylvania is the largest collection of German materials in the U.S outside a university. The library specializes in 19th century works and its strengths lie in the areas of history, travel liturature, popular literature, religion, and children's books.
A special collection of approximately 10,000 works on German-Americana documents all aspects of German-American life in the U.S., with special emphasis on Pennsylvania.