The Clyfford Still Museum is an art museum in Denver, Colorado. The Museum's collection includes 3,125 works by abstract expressionist Clyfford Still (1904-1980), which represents 93 percent of the artist's lifetime output and complete archives. The 28,500-square-foot building opened in 2011 and includes nine galleries, an art studio, visible painting storage areas and conservation lab, two outdoor terraces, archive displays, and outdoor forecourt green space.