The Smithsonian Institution is the world's largest museum, education, and research complex. It comprises 21 museums, 14 education and research centers, the National Zoo, and numerous libraries and historical landmarks, primarily located in Washington, D.C., with additional facilities in Maryland, New York, and Virginia
. Founded in 1846 through a bequest from British scientist James Smithson, who left his estate to the United States to create "an establishment for the increase and diffusion of knowledge," the Smithsonian serves as a trust instrumentality of the U.S. government. It operates independently of the three branches of government and is administered by a Board of Regents and a Secretary
. The Smithsonian's mission is to preserve heritage, discover new knowledge, and share resources with the world. It holds over 157 million items in its collections, making it a major center for research and public education in fields such as art, history, science, and culture. Most of its museums offer free admission, reflecting its commitment to public access
. In summary, the Smithsonian Institution is a vast and multifaceted organization dedicated to advancing knowledge through museums, research, education, and public engagement, established from the legacy of James Smithson and supported by the U.S. government
