Completed in 1917, the Immaculate Conception Church traces its history back to the first Catholic Mass celebrated in California. Captain Sebastian Vizcaino had a tent hastily erected so that three Catholic priests accompanying his Spanish expedition could celebrate a mass of gratitude for a safe voyage Nov. 12, 1602. The current house of worship replaced an adobe structure built in 1851. The bell tower houses one of the two original bells from the San Diego Mission. The other is located at the Mission San Diego de Alcala.