Antipope Sylvester IV

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Sylvester IV was a claimant to the papacy from 1105 to 1111.

Members of the Roman aristocracy, with the support of the future Emperor Henry V (1105–25) set up another antipope to replace Pope Paschal II (1099–1118), electing Maginulfo, the Archpriest of St. Angelo in Peschiera, while Paschal II was outside of Rome. After his election, Maginulfo took the papal name of Sylvester IV and was consecrated in the Church of St. Maria Rotonda (the Pantheon) and was enthroned in the Lateran on November 18, 1105. When Paschal II returned to Rome the next day, Sylvester IV left for Tivoli and finally settled in Osimo, Province of Ancona, under the protection of Count Guarniero di Ancona. On April 11, 1105, Paschal II and Emperor Henry IV (1056–1105) reached an agreement about the investiture of Catholic bishops. Then the Emperor, who had used Sylvester IV to exercise pressure on Paschal II, made the antipope abandon his claim to the office of Pope and submit to Paschal II. He was allowed to live out the rest of his life in Ancona with his patron, Duke Guarniero.

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Antipopes of the Roman Catholic Church

Hippolytus • Novatian • Felix II • Ursicinus • Eulalius • Laurentius • Dioscorus • Theodore • Paschal • Constantine II • Philip • John VIII • Anastasius • Christopher • Boniface VII • John XVI • Gregory VI • Silvester III • Benedict X • Honorius II • Clement III • Theodoric • Adalbert • Sylvester IV • Gregory VIII • Celestine II • Anacletus II • Victor IV (1138) • Victor IV (1159–1164) • Paschal III • Callixtus III • Innocent III • Nicholas V • Clement VII • Benedict XIII • Alexander V • John XXIII • Clement VIII • Benedict XIV • Felix V • Peter II

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