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Severinus (born, Rome [Italy]—died August 2, 640, Rome) was a pope who was forced to wait one and a half years for consecration because he declined to endorse the Byzantine emperor Heraclius’s statement of faith, the Ecthesis, which propounded Monothelitism—i.e., the unorthodox doctrine of a single will in Christ (see Monothelite). Severinus was chosen about October 15, 638, to succeed Pope Honorius I, and legates went to Constantinople (now Istanbul) for Heraclius’s confirmation of the...