Synod of Gangra
The exact date is contested, but is generally agreed to be the year 340.[1][2] The synod was arranged with 14 bishops and led by Eusebius of Nicomedia.The concluding canons of the synod condemned the Manichaeans for their actions, and declared many of their practices anathematised.The synod also spoke against the beliefs and actions of Eustathius of Sebaste.[4] The canons of the synod condemned and anathematised the practices of:[5]