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Dioscorus (born, Alexandria [Egypt]—died October 14, 530, Rome) was a pope, or antipope, for 23 days in 530. A deacon in the Alexandrian Church, he clashed with the Miaphysites (Christians teaching that Christ has one nature, rather than two—i.e., human and divine) and went to Rome. Under Pope Symmachus he was papal legate at Ravenna to the Ostrogothic king Theodoric the Great. In 519 Dioscorus led a legation dispatched by Pope Hormisdas to Constantinople, where,...