Founded in 1800, the Library of Congress is one of the four official national libraries in the United States and one of the most important libraries in the world. With the support of the U.S. Congress, the Library of Congress was built through public funds, appropriate appropriations from the U.S. Congress, donations from private enterprises and the joint efforts of all the staff committed to library work. It is the oldest federal cultural institution in the United States, has become the largest treasure house of knowledge in the world, is an important symbol of American knowledge and democracy, and occupies an important position in American culture. It has preserved nearly 654.38+265.438+00,000 items of various collections, and more than two-thirds of the books are stored in the form of multimedia. These include many rare books, special collections, the world's largest maps, movies and TV movies.