Tours in D.C. : The Library of Congress
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 nearly 128 million items on approximately 530 miles of bookshelves. The collections include more than 29 million books and other printed materials, 2.7 million recordings, 12 million photographs, 4.8 million maps, and 57 million manuscripts.
Constituents receive a tour of the Thomas Jefferson Building and an introduction to the “American Treasures” exhibition. Tours are available Monday through Friday except federal holidays. For updated information please call the tour office at (202) 707-8000