The Churches which had never followed the Quartodeciman practice, surpassed the others in number and influence, so much the more as Egypt, where the Church had been organised by a disciple of St Peter, and also Greece, were among their number. When strife arose over this point, the numerically weaker party ought to have yielded, but rather than this, they separated from the Catholic Church under the form of Ebionitism. Irenæus traces the opposition of the Roman Church to the Quartodeciman Easter back to Sixtus I. (116-125). “The Roman Bishops,” he says according to Eusebius,[114] “neither observed the Passover in this way themselves, nor allowed those under their authority so to observe it.” Should the thought here arise in the mind that the Roman practice came into existence first under Sixtus, it is contradicted by the letter of Polycrates to Pope Victor where it is said that Rome appealed to the Apostles Peter and Paul in support of her custom. The chief reason why the Jewish Quartodeciman practice of the other Churches finally succumbed, was that Christians desired to commemorate not merely the day of our Lord’s death alone, which was linked to the 15th Nisan, but also His Resurrection. The Resurrection had a close connection with His death in point of time, and its commemoration was already firmly established in apostolic times in the form of Sunday (see above, p. 5). It was thus impossible to pass over the Sunday, and so practically an entire week was occupied by the commemoration. The events of Holy Week given above could not be separated from each other; they must be kept in connection. The Jews, as Epiphanius[115] remarks in his polemic against the Audians, keep their passover on a single day, while the Christians required a whole week for their Easter commemorations. And so, although they took the date of the Jewish passover as the basis of their calculations, they nevertheless did not limit the duration of their feast to that one day. Finally, another point which had weight, was that the Christians of the fourth century had a fixed idea that the 14th Nisan must not fall before the vernal equinox.[116]