Oakland Museum of California. The Oakland Museum of California or OMCA is an interdisciplinary museum dedicated to the art, history, and natural science of California, located adjacent to Oak Street, 10th Street, and 11th Street 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 building, designed by architect Kevin Roche John Dinkeloo and Associates LLC, with landscape design by Dan Kiley and gardens by Geraldine Knight Scott, is an important example of mid-century modernism and the integration of indoor and outdoor spaces. The concrete building includes three tiers, one each focusing on the art, history, and natural science collections, along with temporary exhibition galleries, an auditorium, a restaurant, and other ancillary spaces.
   Outdoor architectural features are terraced roof gardens, patios, outdoor sculpture, a large lawn area, and a koi pond. Between 2009 and 2013, the museum underwent a major renovation and expansion designed by Mark Cavagnero Associates.
   The art and history galleries were closed from August 2009 to May 2010, followed by closure of the natural science gallery and education facilities. Skidmore, Owings and Merrill designed the environmental graphics pro
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