Founded during the 1870s, SFAI was the vanguard for 1960s Bay Area Abstraction, 1970s conceptual art, and 1990s new media art – glimpse what's next in Walter and McBean Gallery . Diego Rivera's 1931 The Making of a Fresco Showing a Building of a City sprawls across Diego Rivera Gallery , showing the artist pausing to admire the constant work-in-progress that is San Francisco.