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Elaborate illustration to 13th-century manuscript of his Summa de virtutibus et vitiis or Summa vitiorum, showing a symbolic knight protected by the Shield of the Trinity preparing to do battle with the seven deadly sins.

William Perault, (c. 1190 – 1271), also spelled Perauld; Latinized Peraldus or Peraltus, was a Dominican writer and preacher.