Context: Popular opinion remained firmly behind the celebration of Mary's conception. In 1439, the Council of Basel, which is not reckoned an ecumenical council, stated that belief in the immaculate conception of Mary is in accord with the Catholic faith. By the end of the 15th century the belief was widely professed and taught in many theological faculties, but such was the influence of the Dominicans, and the weight of the arguments of Thomas Aquinas (who had been canonised in 1323 and declared "Doctor Angelicus" of the Church in 1567) that the Council of Trent (1545–63)—which might have been expected to affirm the doctrine—instead declined to take a position.

Question: Where did the mass majority stand in relation to having or not having the Mary inception festivals ?
Answer: Popular opinion remained firmly behind the celebration of Mary's conception.

Question: How did the Holy Roman Church rule on the matter of the festivals ?
Answer: stated that belief in the immaculate conception of Mary is in accord with the Catholic faith.

Question: Was the practce behind the meaning of the Mary inception festivals taught at Universities of theology ?
Answer: end of the 15th century the belief was widely professed and taught in many theological faculties

Question: In what year was the famous friar named Tom given a position as a saint of the Holy Roman Catholic Church ? 
Answer: Thomas Aquinas (who had been canonised in 1323

Question: What happened to Tom at one of the 1567 that changed his title ?
Answer: declared "Doctor Angelicus" of the Church in 1567

Question: What celebration did popular opinion oppose?
Answer: Unanswerable

Question: Who said that belief in the immaculate conception of Mary is not in accord with Catholic belief?
Answer: Unanswerable

Question: What counsel was held in the fourteenth century?
Answer: Unanswerable

Question: What belief was taught in many theological facilities by the 1500s?
Answer: Unanswerable

Question: What counsel held between 1545 and 1563 affirmed the doctrine?
Answer: Unanswerable