First Council of Nicaea (325)

First Council of Nicaea: first of the seven Ecumenical Councils in which Christian doctrine was established (325).

The First Council of Nicaea (325)

Organized by the emperor Constantine I the Great in Nicaea;
recognized by pope Sylvester I;
discussion of the teachings of Arius, who maintained that Christ was created by God;
dogma that Christ is fully God and equal to the Father;
the Nicene Creed established;
rules for the computation of the Easter date.