Pope Sylvester I (also Silvester, 285 – 31 December 335) was the bishop of Rome from 31 January 314 until his death. He filled the see of Rome at an important era in the history of the Western Church, yet very little is known of him. The accounts of his pontificate preserved in the seventh- or eighth-century contain little more than a record of the gifts said to have been conferred on the church by Constantine I, although it does say that he was the son of a Roman named Rufinus. His feast is celebrated as Saint Sylvester's Day, on 31 December in Western Christianity, and on 2 January in Eastern Christianity. Pontificate Large churches were founded and built during Sylvester I's pontificate, including Basilica of St. John Lateran, Basilica of the Holy Cross in Jerusalem, Old St. Peter's Basilica and several churches built over the graves of martyrs. Sylvester did not attend the First Council of Nicaea in 325, where the Nicene Creed was formulated, but he was represented by two legates, Vitus and Vincentius, and he approved the council's decision. One of the Symmachian forgeries, the Constitutum Silvestri, is an apocryphal alleged account of a Roman council, which partially builds on legends in the Acts of Sylvester which has been preserved in Greek, Syriac, and in Latin and the fictional stories of Sylvester's close relationship with the first Christian emperor. These also appear in the Donation of Constantine. Legacy Long after his death, the figure of Sylvester was embroidered upon in a fictional account of his relationship to Constantine, which seemed to successfully support the later Gelasian doctrine of papal supremacy, papal auctoritas (authority) guiding imperial potestas (power), the doctrine that is embodied in the forged Donation of Constantine of the eighth century. In the fiction, of which an early version is represented in the early sixth-century Symmachean forgeries emanating from the curia of Pope Symmachus (died 514), the Emperor Constantine was cured of leprosy by the virtue of the baptismal water administered by Sylvester. The Emperor, abjectly grateful, not only confirmed the bishop of Rome as the primate above all other bishops, he resigned his imperial insignia and walked before Sylvester's horse holding the Pope's bridle as the papal groom. The Pope, in return, offered the crown of his own good will to Constantine, who abandoned Rome to the pope and took up residence in Constantinople. "The