Seoul and Hong Kong locations. The first major American museum retrospective of Gilliam's work in nearly two decades was scheduled to open in 2020 at the Hirshhorn Museum and Sculpture Garden in Washington, D.C., but was rescheduled to 2022 due to the COVID-19 lockdowns. The show, Sam Gilliam: Full Circle, opened in May 2022 as an exhibition of works the artist had produced almost exclusively during the COVID-19 pandemic, instead of a broader retrospective as originally planned. Full Circle was Gilliam's final show during his lifetime, opening one month before his death. The first posthumous solo exhibition of Gilliam's work, Late Paintings, opened at Pace's London gallery in October 2022. Late Paintings was the final show Gilliam had planned during his life and was his first solo exhibition in the United Kingdom. He also participated in many group exhibitions, including The De Luxe Show (1971), DeLuxe Theater, Houston; the 36th Venice Biennale (1972); Gilliam/Edwards/Williams: Extensions (1974), Wadsworth Atheneum, Hartford, Connecticut; the Marrakech Biennale (2016); and the 57th Venice Biennale (2017). Notable works in public collections Long Green (1965), Anacostia Community Museum, Smithsonian Institution, Washington, D.C. Shoot Six (1965), National Gallery of Art, Washington, D.C. They Sail (1966), The Phillips Collection, Washington, D.C. Red Petals (1967), The Phillips Collection, Washington, D.C. Carousel State (1968), Metropolitan Museum of Art, New York Double Merge (Carousel I and Carousel II) (1968), Museum of Fine Arts, Houston, and Dia Art Foundation, New York (jointly owned) Relative (1968), National Gallery of Art, Washington, D.C. Restore (1968), Speed Art Museum, Louisville, Kentucky 10/27/69 (1969), Museum of Modern Art, New York April 4 (1969), Smithsonian American Art Museum, Smithsonian Institution, Washington, D.C. Dakar I (1969), Philadelphia Museum of Art Green April (1969), Kunstmuseum Basel, Switzerland Light Depth (1969), Hirshhorn Museum and Sculpture Garden, Smithsonian Institution, Washington, D.C. Swing (1969), Smithsonian American Art Museum, Smithsonian Institution, Washington, D.C. Basque 1 Range (1970), Pérez Art Museum Miami Change (1970), Mumok, Vienna, Austria Change (1970), Louisiana Museum of Modern Art, Humlebæk, Denmark Leaf (1970), Dallas Museum of Art Simmering (1970), Tate, London Carousel Merge (1971), Walker Art Center, Minneapolis Carousel Merge 2 (1971), Milwaukee Art Museum Day Tripper (1971), Carnegie Museum of Art, Pittsburgh Rondo (1971), Kunstmuseum Basel, Switzerland Wide Narrow (1972), Rose Art Museum, Waltham, Massachusetts "A" and the Carpenter I (1973), Art Institute of Chicago N°1 D (1977), Musée d'Art Moderne de Paris Rail (1977), Hirshhorn Museum and Sculpture