The Archival Center that the Archdiocese of Los Angeles built at the San Fernando Mission and opened in 1980 is a measured response to the church's obligation to collect and preserve records associated with the human activities constituting California's Catholic heritage. The facility houses papers, documents, correspondence, and related materials generated since 1840 by the Archdiocese of Los…

Founded in 1956, the Orange Empire Railway Museum preserves the railway history of Los Angeles and Southern California. In addition to its large collection of full size railway cars and locomotives, its archives contains extensive materials on the Los Angeles Railway and Pacific Electric Railway, as well as the mainline railroads that served Southern California.

Collections include pamphlets and ephemera documenting the growth, industries, transportation, and social organizations of Los Angeles and greater southern California; photograph collections; thousands of books related to southern California; and numerous archival collections related to indiviuals, the citrus industry, and businesses in the Inland Empire.