The office of bishop and the governance of a church (a religious denomination) by bishops.
Bishops collectively: Synonym of episcopate.
The office of one who is principal or preeminent (such as a prince); the quality or status of being principal; preeminence.
The early period of the Roman Empire, during which some characteristics of the government of the Roman Republic were retained; the reign of any particular emperor during said period.
A state ruled by a prince; a principality.
Primary; principal.