in the year 431 a.d., the dogma of Mary as Theotokos, ‘Mother of God,’ was in Council proclaimed … Mary, Queen of Martyrs, became the sole inheritor of all the names and forms, sorrows, joys, and consolations of the goddess-mother in the Western World
Campbell argues that the Ephesian proclamation of Mary as Theotokos was the culminating moment in which the Great Goddess’s accumulated cultic heritage was consciously transferred to a single Christian figure.
, Occidental Mythology: The Masks of God, Volume III, 1964thesis