Born in San Mateo, California, Sam Francis (1923–1994) was an influential American abstract expressionist painter and printmaker whose artistic career spanned several decades and achieved international recognition. Francis initially studied botany, medicine, and psychology at the University of California, Berkeley, before being drafted into the U.S. Army Air Corps during World War II. While hospitalized for a wartime injury, he began painting as a form of therapy, sparking a lifelong passion that led him to pursue formal training, ultimately earning a BA and an MA from Berkeley under the guidance of Davis Park.

Francis quickly gained acclaim for his luminous, fluid, and expansive paintings. His work is associated with the second generation of abstract expressionism and the “post-painterly abstraction” movement. He experimented with diverse techniques and media, particularly in printmaking, mastering lithography and monotype to explore texture, color, and gestural mark-making.

Throughout his career, Francis exhibited widely, and his works are held in major museum collections worldwide, including the Museum of Modern Art in New York, the Tate Modern in London, and the Centre Pompidou in Paris. Known for his expressive use of color, light, and space, Francis created a visual language capable of evoking profound emotional responses. Today, he is celebrated as one of the most innovative figures of post-war American abstraction, whose contributions continue to influence contemporary artists and the study of modern painting.