Church Fathers I. Mary is the Mother of God

"After this, we receive the doctrine of the resurrection from the dead, of which Jesus Christ our Lord became the first-fruits; Who bore a Body, in truth, not in semblance, derived from Mary the mother of God in the fullness of time sojourning among the race, for the remission of sins: who was crucified and died, yet for all this suffered no diminution of His Godhead." Alexander of Alexandria, Epistle to Alexander, 12 (A.D. 324).