Episcopal polity

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Episcopal polity is a form of church governance which is hierarchical in structure with the chief authority over a local Christian church resting in a bishop (Greek: episcopos). This episcopal structure is found most often in the various churches of either Orthodox or Catholic lineage. Some churches founded independently of these lineages also employ this form of church governance.

It is usually considered that the bishops of an episcopal polity derive part of their authority from an unbroken, personal Apostolic Succession from the Twelve Apostles of Jesus. Bishops with such authority are known as the historic episcopate.

For most of the history of Christianity, episcopal government was the only form known to Christianity, excluding all the independent churches (e.g. The Cathari, Valdese, Bogomols, Paulicians, Henricians, Petrobrussians, Culdees, Waldensians, etc.). This all changed at the Reformation. Nowadays the majority of Protestant churches are organized by either congregational or presbyterian church polities, both descended from the writings of John Calvin, a Protestant reformer working and writing independently following the break with the Roman Catholic Church precipitated by the 95 theses of Martin Luther. However, the majority of Christians are still members of the historic churches of episcopal governance.

There are subtle differences in governmental principles among episcopal churches at the present time. To some extent the separation of episcopal churches can be traced to these differences in ecclesiology, that is, their theological understanding of church and church governance. The churches of Rome and Constantinople (the Catholic and Eastern Orthodox Churches in modern terms) have an episcopal government, as do the Oriental Orthodox, Assyrian, Anglican, some Lutheran and many Methodist churches.