 In the Greek tradition, all bishops may be addressed directly as ""Déspota"" (despot, "Sire"), an unofficial but highly reverential form of address.The bishop wears a monastic garment called a mantiya when he arrives for a divine service.Unlike the typical monastic mantiya, which is black, that of the bishop is some other colour, purple for bishops and Greek metropolitans, blue for archbishops and non-Greek metropolitans, and green for a patriarch.