The creation of a new eparchy for the western United States was proposed by the metropolitan Council of Hierarchs in 1981. The Congregation for the Oriental Churches, a dicastery of the Roman Curia responsible for the Eastern Catholic Churches in communion with the Holy See, recommended the erection of a new eparchy, and it was approved by Pope John Paul II.[citation needed]
After the Northridge earthquake of 1994 damaged the Cathedral of St. Mary, the eparchial offices, and the bishop's residence, Bishop Kuzma moved his office and residence to Phoenix, Arizona.[citation needed] On February 10, 2010, the seat of the diocese was officially changed to Phoenix. Accordingly, the former pro-cathedral of St. Stephen was given the title of Cathedral, and the Cathedral of St. Mary received the title of Proto-Cathedral.[5]
Byzantine Catholic Metropolia of Pittsburgh (1999). Byzantine-Ruthenian Metropolitan Church of Pittsburgh Directory. Pittsburgh: Byzantine Catholic Metropolitan Church of Pittsburgh. ISBN none.