The Council of Ephesus (431)
The Case of Euprepius and Cyril
The petition of the most pious bishops Euprepius and Cyril, which is set out in the papers they presented, is just. Therefore, according to the holy canons and the laws of the state, which by ancient custom have the force of law, let no innovation be made in the cities of Europa; according to the ancient custom, they are to be governed by the bishops who have governed them before. For since there never was a metropolitan who had power otherwise, so neither from now on will there be any departure from the ancient custom.