Exarch

n.

1.

A viceroy; in Ravenna, the title of the viceroys of the Byzantine emperors; in the Eastern Church, the superior over several monasteries; in the modern Greek Church, a deputy of the patriarch , who visits the clergy, investigates ecclesiastical cases, etc.

Noun	1.	exarch - a bishop in one of several Eastern Orthodox churches in North America
	2.	exarch - a bishop in eastern Christendom who holds a place below a patriarch but above a metropolitan
	3.	exarch - a viceroy who governed a large province in the Roman Empire

bishop