mar 1, 315 - Donation of Constantine

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The text, purportedly a decree of Roman Emperor Constantine I dated 30 March, in a year mistakenly said to be both that of his fourth consulate (315) and that of the consulate of Gallicanus (317), contains a detailed profession of Christian faith and a recounting of how the emperor, seeking a cure for his leprosy, was converted and baptized by Pope Sylvester I. In gratitude, he determined to bestow on the see of Peter "power, and dignity of glory, and vigour, and honour imperial", and "supremacy as well over the four principal sees, Alexandria, Antioch, Jerusalem, and Constantinople, as also over all the churches of God in the whole earth". For the upkeep of the church of Saint Peter and that of Saint Paul, he gave landed estates "in Judea, Greece, Asia, Thrace, Africa, Italy and the various islands". To Sylvester and his successors he also granted imperial insignia, the tiara, and "the city of Rome, and all the provinces, places and cities of Italy and the western regions" [Wikipedia]

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