Gymnasiarch [Latin gymnasiarchus, from Greek γυμνασίαρχος (gymnasiarchos) which derives from Greek γυμνασίον (gymnasion, gymnasium) + ἀρχός (archos, leader from ἄρχειν, archein, to lead)] was the name of an official of ancient Greece whose rank and duties varied widely in different places and at different times. In Athens during the fifth and fourth centuries B.