(modern Sofia). A Council summoned c.343 mainly to settle the orthodoxy of St Athanasius. The E. bishops refused to take part on the ground that Athanasius, whom the E. had deposed, was being regarded by the W. as a member of the synod; the W. bishops therefore met by themselves. They confirmed the restoration of Athanasius and passed some famous disciplinary canons; these included provisions constituting the Bp. of Rome a court of appeal for accused bishops in certain circumstances.