In 1934 Charles Kassler painted a large fresco mural in the hall of Fullerton High School under the auspices of the WPA. Rather traditionally conceived, it celebrated the rural life of early Southern California. A couple of years later, following what appears to have been an all too common practice, the Anglo Board of Trustees, angered that the mural depicted many happy Mexicans, voted to have the mural whitewashed. The mural was restored in the mid-90s, and, since it is fresco, has survived in much better shape than Siqueiros’s America Tropical in downtown Los Angeles.

The link here tells something of the artist Kassler, and there is a following link to a longer article on the history of the mural.