Proto-Cathedral of St. Mary Byzantine Catholic Church

The Proto-Cathedral of St. Mary Byzantine Catholic Church is a parish church and proto-cathedral of the Byzantine Catholic Eparchy of Phoenix, serving the Ruthenian Eastern Catholic population of Los Angeles, California, United States. It was the first Byzantine church in California. It is located on Sepulveda Boulevard in Sherman Oaks, Los Angeles, California. It is the only Byzantine Ruthenian Church in the territory of the Roman Catholic Archdiocese of Los Angeles.
The Byzantine Rite originated at Constantinople during the fourth and fifth centuries. A schism occurred in 1054 separating East and West, but the Byzantine Rite was reunified with Rome in 1646. By the 19th century, Rusyn immigrants brought the Byzantine Rite to America and many parishes were established in Pennsylvania, New Jersey, Ohio and the Northeast.
In 1956, the bishop of the Byzantine Catholic Archeparchy of Pittsburgh granted permission for a priest to minister in Los Angeles. In 1957, the parish purchased land on Sepulveda Boulevard, and the new church was dedicated in 1961.