The Holy Protection of Mary Byzantine Catholic Eparchy of Phoenix, commonly known as the Eparchy of Phoenix and formerly known as the Byzantine Catholic Eparchy of Van Nuys, (Latin: Eparchia Vannaisensis) is a Ruthenian Greek Catholic Church territory jurisdiction or eparchy of the Catholic Church in the western United States. Its episcopal see is Phoenix, Arizona. The last bishop was the Most Reverend John Stephen Pazak.

The Eparchy of Phoenix's territorial jurisdiction consists of thirteen Western States. Churches are presently located in the states of Alaska, Arizona, California, Colorado, Nevada, New Mexico, Oregon, and Washington. It is a suffragan eparchy in the ecclesiastical province of the metropolitan Archeparchy of Pittsburgh. As of 2019^[update], Holy Protection Eparchy of Phoenix has 19 parishes and 2 missions under its canonical jurisdiction. Most parishes follow the Ruthenian recension, although the eparchy includes one parish of the Italo-Albanian Catholic Church^[1] and one of the Russian Greek Catholic Church.^[2]

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]}

The Eparchy of Van Nuys was canonically inaugurated on March 9, 1982, when Archbishop Stephen Kocisko, Metropolitan of the Metropolia of Pittsburgh enthroned Thomas Dolinay as the first bishop of the eparchy. Archbishop Pio Laghi, Apostolic Delegate to the United States, represented the Roman Pontiff and read the Papal Bulla creating the eparchy and appointing Dolinay. Cardinal Timothy Manning, Archbishop of Los Angeles delivered the homily. The Church of St. Mary in Sherman Oaks, California, was designated as the cathedral.^[3]

In 1990, with the retirement of Archbishop Kocisko of Pittsburgh approaching, Pope John Paul II relieved Dolinay of his duties as Bishop of Van Nuys and appointed him Coadjutor Archbishop of the Byzantine Catholic Archeparchy of Pittsburgh on February 19, 1990.^[4] The Pope appointed the Auxiliary Bishop of Passaic, George M. Kuzma, to succeed Bishop Dolinay.^{[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]

This section needs additional citations for verification. (November 2023)

The eparchal headquarters are at 8105 North 16th Street, Phoenix, Arizona.

The eparchy has 19 parishes, two missions, 2,261 faithful, 35 priests, 12 deacons and 1 religious.^[8]

• Byzantine Catholic Metropolitan Church of Pittsburgh
• Byzantine Catholic Archeparchy of Pittsburgh
• Byzantine Catholic Eparchy of Parma
• Byzantine Catholic Eparchy of Passaic
• Byzantine Catholic Exarchate of Saints Cyril and Methodius of Toronto
• List of the Catholic bishops of the United States § Eastern Catholic eparchs

Parishes

• St. Stephen Byzantine Catholic Cathedral, the current cathedral
• Cathedral of St. Mary Byzantine Catholic Church, the former cathedral
• Saint Anne Byzantine Catholic Church
• St. Thomas The Apostle Byzantine Catholic Church