Earliest of the Spanish-influenced architectural styles in California, predating the Spanish Colonial Revival by roughly twenty years. The style draws from the architecture of the California missions themselves. California-originated and one of the only American architectural styles that diffused from west to east, used heavily for early train depots, schools, and civic buildings, and applied to residential work in early Pasadena, South Pasadena, and surrounding cities throughout its era. The SGV residential inventory is small but architecturally significant.