From Hans Roenau:
Yesterday I went to the venerable San Francisco Art Institute on Chestnut Street. One of my objectives was to revisit Diego Rivera's large fresco, painted April - June 1931. Making of a Fresco Showing the Building of a City is one of three murals painted by the master in San Francisco. It is well worth a visit to the Art Institute.
Probably not quite as well known is the handiwork of a humble electrician. This caught my attention and I wonder if he/she was caught up in the spirit of the school, or was merely doing the wiring in the most efficient manner. We may never find out. Regardless, I was really impressed.
more of Han's observations here