Its practitioners were skilled magicians who used a consecrated circle in some desolate spot, often a graveyard, to protect themselves from the anger of the spirits of the dead. In the event of a premature or violent death, the corpse was thought to retain some measure of unused vitality, and so the use of parts of corpses as ingredients of charms came to be an important technique of witchcraft. Necromancy was especially popular in the Middle Ages and Renaissance, and its temptations and perils were vividly described in the Faust stories of Christopher Marlowe and Johann Wolfgang von Goethe
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