There are several types of dioceses in the [[Orthodox Church]]:
* '''Eparchy''': a general term for an ecclesiastical province, though often used technically to refer to the territory over which the [[primate]] has immediate jurisdictional authority (e.g., Moscow and its immediate environs are the eparchy of the Patriarch of Moscow and All Russia).
* '''Exarchate''': often a missionary diocese, though traditionally referring to a diocese in which there is only one bishop with authority, who is often referred to as an ''exarch''.
* '''Metropolis''' (or '''metropolia'''): an ancient diocese (especially in Byzantine areas) or set of dioceses with a [[metropolitan]] as the ruling bishop or primate. A metropolis may have constituent dioceses.