oldest traditions testify, and it will, indeed, become evident to them that Christ's divine utterance, Thou art Peter, and upon this rock I will build My Church, has undoubtedly been realized in the Roman Pontiffs. Many of these latter in the first ages of the Church were chosen from the East, and foremost among them Anacletus, Evaristus, Anicetus, Eleutherius, Zosimus, and Agatho; and of these a great number, after governing the Church in wisdom and sanctity, consecrated their ministry with the shedding of their blood. The time, the reasons, the promoters of the unfortunate division, are well known. Before the day when man separated what God had joined together, the name of the Apostolic See was held in reverence by all the nations of the Christian world: and the East, like the West, agreed without hesitation in its obedience to the Pontiff of Rome, as the legitimate successor of St. Peter, and, therefore, the Vicar of Christ here on earth.
And, accordingly, if we refer to the beginning of the dissension, we shall see that Photius himself was careful to send his advocates to Rome on the matters that concerned him; and Pope Nicholas I. sent his legates to Constantinople from the Eternal City, without the slightest opposition, "in order to examine the case of Ignatius the Patriarch with all diligence, and to bring back to the Apostolic See a full and accurate report"; so that the history of the whole negotiation is a manifest confirmation of the primacy of the Roman See with which the dissension then began. Finally, in two great Councils, the second of Lyons and that of Florence, Latins and Greeks, as is notorious, easily agreed, and all unanimously proclaimed as dogma the supreme power of the Roman Pontiffs.
We have recalled these things intentionally, for they constitute an invitation to peace and reconciliation; and with all the more reason that in Our own days it would seem as if there were a more conciliatory spirit towards Catholics
