The Smithsonian Institution is a group of museums and research centers located in Washington, D.C. Established in 1846, it was created to promote knowledge and culture. The institution includes 19 museums, 21 libraries, and several research facilities, making it one of the largest museum complexes in the world. Visitors can explore a wide range of topics, from American history to natural history and art. Notable museums include the National Air and Space Museum and the National Museum of Natural History. The Smithsonian also conducts scientific research and offers educational programs for people of all ages.