For 10 points, name this ecumenical council convoked by Constantine I in 325 A.D. which outlawed Arianism and has namesake creed.
Prior to this event Sozomen mention a similar meeting taking place in Bithynia and St. Alexander publishes his Epistola Encyclica. One of the issues settled at this event resulted in the removal of episcopal rights from an Egyptian bishop named Meletius. This council also determined that the celebration of a particular holiday would occur on the Sunday after the fourteenth day of the Paschal moon, which was known as the Easter Controversy. This council as a result of the vigorous anathematizing by Athanasius declared a presbyter from Alexandria a heretic. For 10 points, name this ecumenical council convoked by Constantine I in 325 A.D. which outlawed Arianism and has namesake creed.
Prior to this event Sozomen mention a similar meeting taking place in Bithynia and St. Alexander publishes his Epistola Encyclica.
First Council of {Nicea}