The iconic symbol of Riverside, the unique City Raincross Symbol is derived from combining a replica of the mass bell used by Father Junipero Serra, missionary priest and founder of the California Missions, and the cross to which the Navajo and Central American Indians prayed for rain. Called the "Raincross" symbol, it was designed for the Mission Inn and given to the city by Frank Miller. The Raincross symbol has been identified with Riverside since 1907. Variations of the symbol are used extensively throughout Riverside in architecture, street signs and lighting standards, and is used on the City flag.