Several Canons were made by this Council relating to the Discipline of the Church. 1. It was ordained, that _Easter_ should be kept on the same Day, and on a _Sunday_, by all the Churches in the World; and that the Bishop of _Rome_ should acquaint the other Churches with the Day. But it was afterwards ordained, that the Bishop of _Alexandria_ should fix the Day, and give timely notice of it to the Bishop of _Rome_, that by his means it might be notified to the whole Church. This Ordinance St. _Cyril_ seems to ascribe to the Council of _Nice_; for he says, that it was _so enacted by the Synod composed of all the Saints of the Earth_; which, at the Time he writ, that is, about the Year 360. could be said of no other Synod but that of _Nice_. Pope _Leo the Great_, speaking of this Custom in a Letter to the Emperor _Marcian_, only says, that it was _established by the holy Fathers_[N10.1]. He meant, perhaps, the Fathers of _Nice_. But as they took no notice of such a Custom in their Letter to the Church of _Egypt_, I cannot suppose it to have been introduced by them. The Care of fixing the Day, and acquainting the Bishop of _Rome_ with it, was probably committed to the Bishop of _Alexandria_, because the _Egyptians_ were thought to be better acquainted with the Motions of the heavenly Bodies than any other Nation. In other Provinces the Bishops seem to have been utter Strangers to Astronomy, and to that Ignorance was chiefly owing their Disagreement with respect to the Celebration of _Easter_. This Custom still obtained in the Fifth Century, as appears from a Letter of _Leo the Great_, dated the 28th of _July_ 454. For by that Letter he acquaints the Bishops of _Gaul_ and _Spain_, that the following Year 455, _Easter_ would fall on the 24th of _April_, _as it had been settled in the East_[N10.2]. Before his Time _Innocent_ I. being at a Loss to know on what Day _Easter_ should be kept in 414. had recourse to _Aurelius_ Bishop of _Carthage_, intreating him to examine that Point in a Council, and let him know what they determined, that he might notify it, as was customary, to other Churches. _Innocent_ had quarreled, on _Chrysostom_’s Account, with the Eastern Bishops; and therefore chose rather to be informed and directed by the _African_ Bishops than by them. 2. It was decreed, that such as had been baptized by Heretics in the Name of the Trinity, should not be rebaptized, but admitted into the Church only by the Imposition of Hands. But to this Decree of the Council no greater Regard was paid, than had been paid in St. _Cyprian_’s Time to the Decisions of Pope _Stephen_. For in the Year 370. the same Practice of rebaptizing Heretics still obtained in several Churches of _Africa_, as appears from _Optatus_, who writ about that time. In the East some held, and some denied, the Validity of Baptism administred by an Heretic. Of the latter Opinion was the