Answer:
Pentarchy means a group of five countries or districts each under its own ruler or government.
Step-by-step explanation:
It was formulated in the laws of Emperor Justinian I (527–565) of the Roman Empire. In this model, the Christian church is governed by the heads (patriarchs) of the five major episcopal sees of the Roman Empire: Rome, Constantinople, Alexandria, Antioch, and Jerusalem.
I hope that helps you and please mark my answer as the brainliast answer