COUNCIL OF SARDICA, an ecclesiastical council convened in 343 by the emperors Constantius and Constans, to attempt a settlement of the Arian controversies, which were then at their height.
He determined also to introduce into the Church many desirable reforms. His project was approved by an ecclesiastical council and was supported by the tsar, but it met with violent opposition from a large section of the clergy, and it alarmed the ignorant masses, who regarded any alterations in the ritual, however insignificant they might be, as heretical and very dangerous to salvation.
As no voice was raised in his defence and the decision of the ecclesiastical council which condemned him was universally accepted without protest, we must conclude that the conflict was not really between Church and State but simply between the haughty, ambitious Patriarch Nikon and the devout, long-suffering Tsar Alexius.
At the ecclesiastical council which took place at Paris in 1406 Pierre d'Ailly made every effort to avert a new withdrawal from the obedience and, by order of the king, took the part of defender of Benedict XIII., a course which yet again exposed him to attacks from the university party.