The Palace of Fine Arts is a monumental structure located in the Marina District of San Francisco, California, originally built for the 1915 Panama–Pacific International Exposition to exhibit works of art. It was constructed from concrete and steel, and the building was claimed to be fireproof. According to a metal plate at the rotunda, it was rebuilt under B.F. Modglin, local manager of MacDonald& Kahn, between 1964 and 1967. In the years 1973 and 1974, the columniated pylons were added.