カルケドン公会議
He was a firm opponent of the Council of Chalcedon and held communion with those who accepted the Henotikon of Emperor Zeno without imposing a formal anathema on Chalcedon. By doing so, he largely kept the church in peace, although also continuing the schism of the Acephaloi, who opposed both the Council of Chalcedon and the conciliatory approach of the Henotikon.