The founder of the The Hammer Museum ran what company from 1957 until his death?
Hammer Museum:  Founded in 1990 by the entrepreneur-industrialist Armand Hammer to house his personal art collection, the museum has since expanded its scope to become "the hippest and most culturally relevant institution in town." Armand Hammer: Armand Hammer (May 21, 1898 – December 10, 1990) was an American business manager and owner, most closely associated with Occidental Petroleum, a company he ran from 1957 until his death, though he was known as well for his art collection, his philanthropy, and for his close ties to the Soviet Union.
Occidental Petroleum