Cooper Hewitt, Smithsonian Design Museum is a design museum housed within the Andrew Carnegie Mansion in Manhattan, New York City, along the Upper East Side's Museum Mile. It is one of 19 museums that fall under the wing of the Smithsonian Institution and is one of three Smithsonian facilities located in New York City, the other two being the National Museum of the American Indian's George Gustav Heye Center in Bowling Green and the Archives of American Art New York Research Center in the Flatiron District. It is the only museum in the United States devoted to historical and contemporary design. Its collections and exhibitions explore approximately 240 years of design aesthetic and creativity.