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Pentarchy - Wikipedia
Hierarchy of the Catholic Church - Wikipedia
Catholic-Hierarchy: Its Bishops and Dioceses, Current and Past
Bishops in the Catholic Church - Wikipedia
What the Early Church Believed: Bishop, Priest, and Deacon
Pentarchy | Byzantine Empire, Justinian I & Justinian Code
Pentarchy - CNEWA
Bishop | Definition, History, & Role | Britannica
Bishops of the United States: the basics - National Catholic Reporter
Who Are The Five Bishops In Cult Of The Lamb? - TheGamer