The aediles originated as two subordinates of the tribunes of the plebs whose sacrosanctity they shared. Their central function was to supervise the common temple (aedes) and cults of the plebs, those of *Ceres and *Diana on the *Aventine, but they also acted as the executives of the tribunes. With the addition in 367 bce of two aediles curules, elected from the patricians, the aedileship became a magistracy of the whole people, but the subsequent functions of both sets of aediles can be chiefly explained as patronage of the urban plebs. After the admission of plebeians the curule magistracy was held alternately by either order, but in the empire was omitted by patricians. Aediles were elected annually, the plebeii in the *conciliumplebis, the curules in the *comitiatributa. Curules ranked below praetors, plebeii at first below tribunes but eventually with the curules.