Moralia in Job, also called Moralia, sive Expositio in Job or Magna Moralia, is a commentary on the Book of Job by Gregory the Great, written between 578 and 595. It was begun when Gregory was at the court of Emperor Tiberius II in Constantinople, but finished only several years after he had returned to Rome. It is Gregory's major work, filling some 35 books or 6 volumes. Its actual title is "An Extensive Consideration of Moral Questions".