Context: By 750, the feast of her conception was widely celebrated in the Byzantine East, under the name of the Conception (active) of Saint Anne. In the West it was known as the feast of the Conception (passive) of Mary, and was associated particularly with the Normans, whether these introduced it directly from the East or took it from English usage. The spread of the feast, by now with the adjective "Immaculate" attached to its title, met opposition on the part of some, on the grounds that sanctification was possible only after conception. Critics included Saints Bernard of Clairvaux, Albertus Magnus and Thomas Aquinas. Other theologians defended the expression "Immaculate Conception", pointing out that sanctification could be conferred at the first moment of conception in view of the foreseen merits of Christ, a view held especially by Franciscans.

Question: What was widely observed in the eastern portion of the Byzantine world ?
Answer: the feast of her conception was widely celebrated in the Byzantine East

Question: What was the name of this festival ?
Answer: under the name of the Conception (active) of Saint Anne

Question: Was there anything in similarity that happened in the Western portion of the Empire ? If so who was it supported by?
Answer: In the West it was known as the feast of the Conception (passive) of Mary, and was associated particularly with the Normans

Question: Who was against all of the celebrations of Mary 's her birth ?
Answer: Critics included Saints Bernard of Clairvaux, Albertus Magnus and Thomas Aquinas.

Question: According to some when is is possible for a Sanctified Mary to have emerged ?
Answer: out that sanctification could be conferred at the first moment of conception in view of the foreseen merits of Christ, a view held especially by Franciscans.

Question: What was widely celebrated in the West by 750?
Answer: Unanswerable

Question: What group in the West was the conception of St. Anne associated with
Answer: Unanswerable

Question: What did Thomas Aquinas support attaching to the title conception of Mary?
Answer: Unanswerable

Question: When did the Eastern church start to celebrate the conception of Mary?
Answer: Unanswerable

Question: What is St. Albertus Magnus say could be conferred at the moment of conception?
Answer: Unanswerable