The Oakland Museum of California or OMCA (formerly the Oakland Museum) is an interdisciplinary museum dedicated to the art, history, and natural science of California, located in Oakland, California. The museum contains more than 1.8 million objects dedicated to "telling the extraordinary story of California." It was created in the mid-1960s out of the merger of three separate museums dating from the early 20th century, and was opened in 1969.
The museum owns more than 70,000 examples of California art and design, created from the mid-1800s to the present. Painters represented in the art collection include Addie L. Ballou, Albert Bierstadt, George Henry Burgess, Richard Diebenkorn, Maynard Dixon, Childe Hassam, Thomas Hill, Amédée Joullin, William Keith, David Park, Mel Ramos, Granville Redmond, Jules Tavernier, Wayne Thiebaud, and the "Society of Six" (William H. Clapp, Selden Connor Gile, August Gay, Bernard Von Eichman, Maurice Logan, and Louis Siegriest). The museum holds the personal archives of Dorothea Lange and images by many other noted photographers.
Source: https://en.wikipedia.org/wiki/Oakland_Museum_of_California