The Council of Serdica, or Synod of Serdica, was a synod convened in 343 at Serdica in the civil diocese of Dacia, by Emperors Constans I, Augustus in the West, and Constantius II, Augustus in the East. It attempted to resolve "the tension between East and West in the Church." “The council was a disaster: the two sides, one from the west and the other from the east, never met as one.”