The world's largest library. View historic photos, maps, books and more. Contact experts for help with research. Plan a visit. Home of U.S. Copyright Office.

Preservation partners from around the world are selecting and preserving at risk digital content organized into over 1400 collections. See a full list of collections below or explore them in an …

The collection grew slowly and suffered another major fire in 1851, which destroyed two-thirds of Jefferson's original books. The Library of Congress faced space shortages, understaffing, and lack of …

The Main Reading Room works with partners across the Library to digitize General collections materials, helping all Library users gain access to unique collection items. We regularly digitize select items …

Access online collections: view maps & photographs; read letters, diaries & newspapers; hear personal accounts of events; listen to sound recordings & watch historic films.

Explore our subject and collections guides prepared by Library of Congress staff. These guides cover Library of Congress materials and databases available on-site, as well as select free online resources.

Pictorial materials are found in many units of the Library of Congress. The Prints & Photographs Division, alone, holds more than 15 million items, including photographs, prints, drawings and …

Contains over 20 million catalog records for books, serials, manuscripts, maps, music, recordings, images, and electronic resources in the Library of Congress collections.

Services & Programs Learn how the Library of Congress collects, preserves & provides access to its universal collections. Get the free tools and standards used by libraries, archives, and publishers.

On Monday, June 30, 2025, the Library of Congress launched its new catalog. The catalog is the main access point for the Library's collections. The new, user-centered interface is powered by …