Council of Sardica
One of the many synods held principally to settle the troubles caused by the Arian heresy, probably in 343.
Ninety-four Catholic bishops and seventy-six bishops favoring Arianism were present.
Failling to reach an agreement, the eastern bishops withdrew and convened at Philippopolis, where they promulgated a new creed and an encyclical, dating it from Sardica (modern Sofia).
Several bishops were excommunicated as a result.
The Catholic bishops investigated the cases of Athanasius, Marcellus, and Asclepas and pronounced them innocent.
Though the council drew up several canons, it failed in its principal object.
New Catholic Dictionary