Cooper Hewitt, Smithsonian Design Museum. Cooper Hewitt is the only museum in the United States devoted exclusively to historical and contemporary design and is the steward of one of the most diverse and comprehensive design collections in existence—more than 215,000 design objects spanning 30 centuries. From ancient textiles and works on paper to icons of modern design and cutting-edge technologies, Cooper Hewitt’s collection serves as inspiration for creative work of all kinds and tells the story of design’s paramount importance in improving our world.