Although the fathers of the Council of Basel were of opinion that the feast was celebrated by the Roman Church on the 8th December, this was only partially correct. The fact is that at Avignon, with the full knowledge of the Papal Court, it had been already celebrated without meeting with any opposition from the authorities. So, too, in Rome it had been celebrated by religious in the churches of their monasteries. It can well have been that Alvarus Pelagius († 1340), as we are informed, preached on this day in Rome; this, however, does not prove that the diocese of Rome, or the Papal Court, had adopted the feast at that date, for that, it would have been necessary to include the day in question in the Calendar and treat it as a festival in the Missal and Breviary. And so it would appear that it was kept as a purely ecclesiastical holy day, and not as yet as a public official holiday with rest from servile work. Nevertheless there were those at Basel who maintained it was a festival of the Roman Church. The Franciscan order, as has been already said, added our Lady’s conception to the number of the feasts observed by themselves. They celebrated it everywhere where they had a church of their own, and also in Avignon and Rome during the residence of the popes. Other orders followed their example—namely, the Benedictines, Cistercians, Carmelites, all of which had houses in Rome,[563] and so, since there were many churches belonging to these orders in Rome, it might well seem as if the Roman Church herself kept the festival, all the more since the popes knew of it and tolerated the practice. In Sixtus IV. (1471-1484), a Franciscan ascended the Papal throne, and he it was who finally took the decisive step in the direction of recognition instead of toleration. On the 27th February 1477[564] he published the Constitution “_Cum præ excelsa_,” in which he granted indulgences on the feast. In particular he granted to all those who on this day recited the office composed by the Papal notary, Leonardo Nogaroli of Verona, and assisted at Mass and the canonical hours, the same indulgences which his predecessors granted for Corpus Christi. In this way the feast was adopted into the diocese of Rome, and made its way into the Calendar, Breviary and Missal, but only as a purely ecclesiastical feast. It must also be observed that no advance was made in the doctrine concerned, for the pope in his decree speaks of a _Conceptio immaculatæ_, or, as he expresses himself in another place, _prælibatæ virginis_, not of an _immaculata conceptio_.