The Library of Congress
The Library of Congress is the research library of the United States Congress and is the oldest federal cultural institution in the United States. The Library's primary mission is researching inquiries made by members of Congress through the Congressional Research Service; although it is open to the public, only legislators, Supreme Court justices and other high-ranking government officials may check out books. Through the United States Copyright Office, the Library of Congress also receives copies of every book, pamphlet, map, print, and piece of music registered in the United States. As the de facto national library, the Library of Congress promotes literacy and American literature through projects such as the American Folklife Center, American Memory, Center for the Book and Poet Laureate.