The Archdiocese of San Francisco is a Latin Church ecclesiastical territory or diocese of the Catholic Church in the northern California region of the United States. The Archdiocese of San Francisco was erected on July 29, 1853, by Pope Pius IX and its cathedral is the Cathedral of Saint Mary of the Assumption.

The Mission San Francisco de Asís, also known as Mission Dolores, is a historic Catholic church complex in San Francisco, California. Operated by the Archdiocese of San Francisco, the complex was founded in the 18th century by Spanish Catholic missionaries. The mission contains two historic buildings:The Mission Dolores adobe chapel, constructed in 1776. It is the oldest structure in San Francisco. The Mission Dolores Basilica, constructed in 1918. It was designated a basilica by Pope Pius XII in 1952.