The Solemnity of Mary's Immaculate Conception Explained

On December 8, 1854 Pope Pius IX defined the Solemnity of the Immaculate Conception as dogma that Mary of Nazareth was conceived without original sin. By this dogma, the Catholic Church confesses: “The most Blessed Virgin Mary was, from the first moment of her conception, by a singular grace and privilege of almighty God and by virtue of the merits of Jesus Christ, Saviour of the human race, preserved immune from all stain of original sin.” (CCC #491-492, 508)

A brief overview of the history and significance of the feast of the Immaculate Conception which is celebrated during Advent on Dec. 8th throughout the whole Church. The video is not-for-profit, and is intended for religious teaching, scholarship, and research purposes only (Fair Use Doctrine: Title 17, para. 107).

Addendum: "Theotokos" literally means God bearer.