The highest-ranking bishops in Eastern Orthodoxy, Oriental Orthodoxy, the Catholic Church (above Major Archbishop and Primate), and the Assyrian Church of the East are termed Patriarchs (and in certain cases also popes). The office and ecclesiastical circumscription (comprising one or more provinces, though outside his own (arch)diocese he is often without enforceable jurisdiction) of such a Patriarch is termed a Patriarchate. Historically, a Patriarch may often be the logical choice to act as Ethnarch, representing the community that is identified with his religious confession within a state or empire of a different creed (as Christians within the Ottoman Empire).