exarch
At the Byzantine ecclesiastical administration the exarch, from the 5th century onwards, was the head of an ecclesiastical province and later became another title of the Ecumenical Patriarch, certifying that he was the head prelate within the jurisdiction of the Ecumenical Patriarchate. The office of exarch was abolished during the 6th century, although exarchs were metropolites or representatives of metropolites who supervised the ecclesiastical provinces or the ecclesiastical and monastic foundations. During the late 14th century as exarchs are referred the metropolites who were located at ancient dioceses and supervised all the ecclesiastical sees and the charitable institutions of the ecclesiastical province and later the authorized representatives of the Patriarch (patriarchal exarchs).

hypertimos
A honorary title granted to metropolitans.

tomos
A term denoting the official ecclesiastical acts.