The kamilavka (Russian: камилавка), in Greek: Kamilavkion (καμιλαύκιον), kalymmavkhion (καλυμμαύχιον), or kalymmavchi (καλυμαύχι)), is an item of head wear among the clerical clothing worn by Orthodox Christian monastics and clergy. As with most items of Orthodox vestments this head wear developed from the clothing worn at the imperial court of the Eastern Roman (Byzantine) empire. The kamilavka is worn during church services.