Library of Congress
The Library of Congress attracts 1.7 million visitors annually while officially serving as the research library for the United States Congress. Established on April 24th, 1800, the library holds the distinction of the United States oldest federal cultural institution. With over 160 million catalogued items spread over three building and a cultural center, the Library of Congress contains the world’s largest collection by size.
Located directly east of the United States Capitol, the Thomas Jefferson Building serves as the main building of the Library of Congress. The Jefferson Building’s stunning Great Hall and Main Reading Room are considered by many to be two of the most architecturally beautiful interiors in Washington, DC.