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St. Sylvester I (born, Rome [Italy]—died 335, Rome; Western feast day December 31, Eastern feast day January 2) was the pope, the leader of the Roman Catholic Church, from 314 to 335. His long pontificate saw the beginnings of the Christian Roman Empire. He is venerated as a patron saint of the Benedictine order and of the chivalric order of the Militia Aurata (also called the Order of the Golden Spur).

Quick Facts
  • Born: Rome (Italy)
  • Died: 335, Rome
  • Reign as pope: January 31, 314–December 31, 335
  • Preceded by: Miltiades
  • Succeeded by: Mark
  • Feast day: December 31 (Western church), January 2 (Eastern church)
  • Patron saint of: Benedictine order and the chivalric order of the Militia Aurata (Order of the Golden Spur)

Little is known about Sylvester’s early life. According to the Liber pontificalis (“The Book of Popes”), he was the son of a Roman named Rufinus; legendary texts give his mother’s name as Justa. A presbyter when elected to succeed Pope Miltiades (Melchiades), Sylvester was consecrated on January 31, 314. The most important event of his reign was the Council of Nicaea in May 325, which condemned the Alexandrian Christian priest Arius, founder of Arianism, a heretical doctrine declaring that God the Son (Jesus) was neither equal with God the Father nor eternal. While the Roman emperor Constantine the Great favored Christianity and was a major controller of its ecclesiastical affairs, neither he nor his immediate successors gave any official recognition to papal primacy over the church. Thus, it was a rare and significant exception when Sylvester was accorded a preeminent role in the Arian crisis. Although invited, he did not attend the Council of Nicaea personally but was represented by two legates, who were treated with great honor and respect yet did not preside at the debates.

According to subsequent legend, Sylvester converted and baptized Constantine, who was the first Roman emperor to become a Christian, and miraculously cured him of leprosy. In return the emperor allegedly gave him the Donatio Constantini (Donation of Constantine), a grant of spiritual supremacy over the Eastern patriarchates and over all matters of faith and worship as well as temporal dominion over Rome and the entire Western world. The Donation is now universally admitted to be an 8th-century forgery, but it was important in the development of the medieval theory of church and state.

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Christ as Ruler, with the Apostles and Evangelists (represented by the beasts). The female figures are believed to be either Santa Pudenziana and Santa Praxedes or symbols of the Jewish and Gentile churches. Mosaic in the apse of Santa Pudenziana, Rome,A
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Sylvester’s papacy saw the construction of several important Roman basilicas, including Old St. Peter’s Basilica (which was replaced in the 16th century by the current church) and the Basilica of St. John Lateran. These structures, however, were built under the orders of Constantine.

Sylvester is believed to have built a church at the cemetery of St. Priscilla on the Via Salaria, where he was buried. In 762 his relics were transferred by Pope Paul I to the basilica of San Silvestro in Capite.

The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Encyclopaedia Britannica.