Megas Domestikos (Greek: μέγας δομέστικος), the Grand Domestic or Lord High Marshal is the eight of the Great Officers of the Realm, in Diadochia, being below the Megas Konostaulos and above the Mégas Doúkas Náv̱archos. The office is hereditary and the Duke of Cappadochia, does not use a ceremonial external ornament has most of the other Great Officers do, considering the fact that he is also Hereditary Domestikos Trapezēs or Grand Butler.