 Bishops are usually drawn from the ranks of the archimandrites, and are required to be celibate; however, a non-monastic priest may be ordained to the episcopate if he no longer lives with his wife (following Canon XII of the Quinisext Council of Trullo) In contemporary usage such a non-monastic priest is usually tonsured to the monastic state, and then elevated to archimandrite, at some point prior to his consecration to the episcopacy.Although not a formal or canonical prerequisite, at present bishops are often required to have earned a university degree, typically but not necessarily in theology.Usual titles are "Your Holiness" for a patriarch (with "Your All-Holiness" reserved for the Ecumenical Patriarch of Constantinople), "Your Beatitude" for an archbishop/metropolitan overseeing an autocephalous Church, "Your Eminence" for an archbishop/metropolitan generally, "Master" or "Your Grace" for a bishop and "Father" for priests, deacons and monks, although there are variations between the various Orthodox Churches.