caesar
In the Roman Empire the title of Caesar was given to the Emperor. From the reign of Diocletian (284-305) on this title was conferred on the young co-emperor. This was also the highest title on the hierarchy of the Byzantine court. In the 8th c. the title of Caesar was usually given to the successor of the throne. In the late 11th c. this office was downgraded and from the 14th c. on it was mainly conferred on foreign princes.

chrysobull
(gold seal) Imperial document of the Byzantine state which was so named because it bore the gold seal of the emperor.

donor
Whoever subscribes, financialy, to the errection of a certain structure (monument etc). In the case of the buildings, donors might lawfully relate to them via a special connection (usufruct or other).

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).

simony
Paying for holy offices or positions in the hierarchy of the church.