Richard Diebenkorn was an influential American painter known for his contributions to Abstract Expressionism and landscape painting. His work had a significant impact on the American art scene in the mid-20th century.
Source: Richard Diebenkorn: Washington Gallery of Modern Art, Washington, D.C., November 6 to December 31, 1964; the Jewish Museum, New York, January 13 to February 21, 1965; Pavilion Gallery, Newport Beach, California, March 14 to April 15, 1965