The Administration Building, Treasure Island, on Treasure Island, California, is a Moderne style building designed by William Peyton Day and George William Kelham that was built in 1938. It has also been known as Building 1, as Command Naval Base San Francisco Headquarters, and as Naval Station Treasure Island. It was listed on the National Register of Historic Places in 2008.The building housed a museum until 1997. In 2011, San Francisco purchased Treasure Island from the U.S.