Justinian's Code laid the legal and prophetic
foundation for the rise of the Papacy.
AD March 533: Justinian's letter to John reads:
"Justinian: victor, pius, fortunate, ever Augustus, to John, the most holy Archbishop and patriarch of the noble city of Rome. Paying honor to the Apostolic See and to Your Holiness, as always has been and is our desire, and honoring your Blessedness as a father, we hasten to bring to the knowledge of Your Holiness all that pertains to the condition of the churches , since it has always been our great aim to safeguard the unity of your Apostolic See and the position of the holy churches of God which now prevails and abides securely without any disturbing trouble. Therefore we have been sedulous to subject and unite all the priests of the Orient throughout its whole extent to the See of Your Holiness. Whatever questions happen to be mooted at present , we have thought necessary to be brought to Your Holiness' knowledge, however clear and unquestionable they might be, and though firmly held and taught by all the clergy in accordance with the doctrine of Your Apostolic See; for we do not suffer that anything which is moored to Your Holiness, however clear and unquestionable, pertaining to the state of the churches, should fail to be known to Your Holiness, as being the head of all the churches. For as we have said before, we are zealous for the increase of the honor and authority of your See in all respects."
Justinian's Code in the edicts of the "Novellae;" in the preamble of the ninth it states:
"that the elder Rome was the founder of the laws; so was it not to be questioned that in her was the supremacy of the pontificate." In the 131st; chap. II, on the ecclesiastical titles and privileges it states: "We therefore decree that the most holy Pope of the elder Rome is the first of all the priesthood, and that the most blessed Archbishop of Constantinople, the new Rome, shall hold the second rank after the holy Apostolic chair of the elder Rome."
Pagan Rome, not the Apostles not Christ, laid the legal political and prophetic foundation for the establishment of the Papacy. 533ad was the date of the legal granting of civil and religious power to the bishop of Rome.
There is a twist to all this however, because Rome at that time was under an occupying power, and enemies to the Byzantine emperor, it was necessary that the city be liberated before the pontiff could exercise his new found authority. Legal authority is issues unless it could be put into effect right? This is where prophecy comes to the fore. This took place in 538ad when Bellisarius defeated the Goths and that Arian kingdom could no longer exercise power over the bishop, for until that time the Gothic king Theodosius had the final say on appointing bishops. So you can mark 538ad on your prophetic calendar.