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 (154563)which might have been expected to affirm the doctrineinstead declined to take a position.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who said that belief in the immaculate conception of Mary is not in accord with Catholic belief?
Ah, so.. unanswerable

T. Gilmartin, (Professor of History, Maynooth, 1890), writes in Church History, Vol. 1, Ch XVII: The Arians sought the approval of an Ecumenical Council. They sought to hold two councils. Constantius, summoned the bishops of the East to meet at Seleucia in Isauria, and those of the West to Rimini in Italy. A preliminary conference was held by the Arians at Sirmium, to agree a formula of faith. A "Homoeon" creed was adopted, declaring The Son to be "like the Father". The two met in autumn of 359. At Seleucia, one hundred and fifty bishops, of which one hundred and five were semi-Arian. The semi-Arians refused to accept anything less than the "Homoiousion", (see: Homoiousian), formulary of faith. The Imperial Prefect was obliged to disband, without agreeing on any creed. Acacius, the leader of the "Homoean" party went to Constantinople, where the Sirmian formulary of faith was approved by the "Home Synod", (consisted of those bishops who happened to be present at the Court for the time), and a decree of deposition issued against the leaders of the semi-Arians. At Rimini were over four hundred of which eighty were Arian, the rest were orthodox. The orthodox fathers refused to accept any creed but the Nicene, while the others were equally in favour of the Sirmian. Each party sent a deputation to the Emperor to say there was no probability to agreement, and asked for the bishops to return to their dioceses. For the purpose of wearing-down the orthodox bishops; (Sulpitius Severius says), Constantius delayed his answer for several months, and finally prevailed on them to accept the Sirmian creed. It was after this Council that Jerome said: " ...the whole world groaned in astonishment to find itself Arian."
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Where did bishops of the West meet?
Ah, so.. Rimini in Italy

The abbey was restored to the Benedictines under the Catholic Mary I of England, but they were again ejected under Elizabeth I in 1559. In 1560, Elizabeth re-established Westminster as a "Royal Peculiar" a church of the Church of England responsible directly to the Sovereign, rather than to a diocesan bishop and made it the Collegiate Church of St Peter (that is, a non-cathedral church with an attached chapter of canons, headed by a dean.) The last of Mary's abbots was made the first dean.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who ejected the Benedictines again in 1595?
Ah, so..
unanswerable