Library of CongressSearch the LoC catalogs, view digital resources, access research guides.
The Library of Congress is the nation's oldest federal cultural institution and serves as the research arm of Congress. It is also the largest library in the world, with millions of books, recordings, photographs, maps and manuscripts in its collections. The Library's mission is to make its resources available and useful to the Congress and the American people and to sustain and preserve a universal collection of knowledge and creativity for future generations. You can search the catalog of holdings online, view digital images, listen to audio files, research copyright, obtain assistance, etc.