The origins of the Papal Tiara remain somewhat clouded in mystery. The word tiara itself occurs in the classical annals to denote a Persian headdress, particularly that of the "great king." A camelaucum which was similar in shape to papal tiaras, was part of court dress in Byzantium. Given that other rituals associated with the Papal Coronation, notably the use of the sedia gestatoria, were copied from Byzantine and eastern imperial ceremonial, it is likely that the tiara is also of Byzantine origin.