The Clyfford and Patricia Still Collections, held by the City and County of Denver, contain approximately 825 paintings and over 2,300 works on paper, including:
- 100 paintings dating from 1920–1943: Pictures from Still’s student years, Depression-era works, Surrealist-inspired works, and first forays into abstraction
- 350 paintings dating from 1944–1960: Still’s “breakthrough period” and the years of “high” Abstract Expressionism, an era when many canvases span over ten-by-fourteen feet
- 375 paintings dating from 1961–1979: Later works, most of which have never been exhibited
- Works on paper spanning all aspects of Still’s career in such media as pastel, crayon, charcoal, gouache, tempera, graphite, and pen and ink—these also have very seldom been exhibited.