She is called "Mother of God" which translates the more accurately stated greek term "Theotokos" or "Birthgiver of God." The Council of Ephesus (431) attributed to Mary the title, Mother of God.

Rejoice, vesture of them that are stripped of boldness! Thou art the bulwark of virgins, O Virgin Theotokos, and of all that flee to Thy protection. Wherefore do we beseech Thee: help, protect, and ...

And the King shall greatly desire thy beauty, for He Himself is thy Lord, and thou shalt worship Him. Entry into the Temple of the Most Holy Theotokos. Panselin, 8th c., Kareyes, Mt. Athos. And first ...