"On Nov. 19, 1781, in an elaborate ritual, Father Serra blessed and laid a cornerstone for the third Mission Church. In a cavity in the cornerstone were placed a crucifix, religious images, and Spanish coins to signify the Church treasury. (The cornerstone was accidentally found by a workman digging for a gas main along Franklin Street in 1911. The cornerstone and its contents are on display in the Mission Room of the University’s de Saisset Museum.)"