The Smithsonian Institution Libraries is a network of libraries that supports the research and educational missions of the Smithsonian Institution. It consists of 21 libraries located across the United States, housing millions of books, manuscripts, and other resources related to various fields, including art, history, and science. These libraries serve not only the staff and researchers of the Smithsonian but also the public, providing access to a wealth of information. They offer various services, including reference assistance, exhibitions, and digital collections, making knowledge accessible to a broader audience.