- City College of San Francisco Mosaic - San Francisco CAThese two 50' x 45' low-relief polished marble mosaics depicting "Organic and Inorganic Science" by the Swiss-born artist Herman Volz are located in the south portico of San Francisco City College's Science Hall. Juan Breda served as assistant mosaicist for the project. The images represent fields such as physics, chemistry, biology, and mathematics in tiny tiles. Text accompanying the mural reads 'Give me a base and I move the world.' Restored in 2005, the murals were originally part of the Golden Gate International Exhibition's "Art in Action" show on Treasure Island before they were moved to the college. "Completed on site,...