High Quality Content by WIKIPEDIA articles! The Holy Protection of Mary Byzantine Catholic Eparchy of Phoenix (formerly known as the Byzantine Catholic Eparchy of Van Nuys) (Latin: Eparchia Vannaisensis) is the Catholic eparchy (diocese) governing most Byzantine Ruthenian Catholics in the western United States. Its headquarters are at 8131 North 16th Street, Phoenix, Arizona. The current bishop is the Most Reverend Gerald Nicholas Dino.