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Constantine (II) (born 8th century—died, Rome?) was an antipope from 767 to 768. He was a soldier and—through the support of his brother Toto, duke of the bishopric of Nepi near Rome—was elected pope on July 5, 767, to succeed St. Paul I. Constantine’s opponents, led by Christopher, the powerful chief of the notaries, fled to the Lombards. Constantine, failing to win support from the Carolingian king Pippin III the Short or from the Franks,...