For Coachella Valley Savings No. 2, E. Stewart Williams gave a bank an unmistakable roof support: reinforced-concrete arches turned upside down. They rise into columns that carry the roof of the 1961 building at 499 South Palm Canyon Drive. The building has also been known as Washington Mutual and Chase Bank. In December 2016, it entered the National Register of Historic Places. Source: https://en.wikipedia.org/wiki/Coachella_Valley_Savings_No._2
Source: National Park Service, National Register of Historic Places, reference #16000885 (2016); Wikipedia, “Coachella Valley Savings No. 2”