After explaining both natural and artificial mummification, the author shows that the incorruption of the Saints bodies fits into neither category but constitutes a much greater phenomenon which is unexplained by modern science even to this day. The author presents 102 canonized Saints, Beati and Venerables, summarizing their lives, the discovery of their incorruption and investigations by Church and medical authorities. The incorruptible bodies of Saints are a consoling sign of Christ's victory over death, a confirmation of the dogma of the Resurrection of the Body, a sign that the Saints are still with us in the Mystical Body of Christ, as well as a proof of the truth of the Catholic Faith for only in the Catholic Church do we find this phenomenon.