generate questions: Roman Catholics believe in the Immaculate Conception of Mary, as proclaimed Ex Cathedra by Pope Pius IX in 1854, namely that she was filled with grace from the very moment of her conception in her mother's womb and preserved from the stain of original sin. The Latin Rite of the Roman Catholic Church has a liturgical feast by that name, kept on December 8. Orthodox Christians reject the Immaculate Conception dogma principally because their understanding of ancestral sin (the Greek term corresponding to the Latin "original sin") differs from the Augustinian interpretation and that of the Roman Catholic Church.
On what date is the feast of the Immaculate Conception in the Latin Rite of the Roman Catholic Church? {sep_token} Which pope proclaimed the Immaculate Conception of Mary? {sep_token} In what year did Pope Pius IX make his Ex Cathedra proclamation of the Immaculate Conception of Mary? {sep_token} According to the doctrine of Immaculate Conception, where was Mary when she first become filled with grace? {sep_token} What is the Greek term that means the same thing as "original sin?"