Brittany... Celtic Armorica, which preserved the memory of ancient horrors and was enriched with new Christian impressions. Werewolves and the savage Merlin lived in its forests, dwarfs danced along the roads, the messenger of death Anku wandered through the wastelands, a death's head stubbornly pursued people, night washerwomen strangled them with freshly washed linen, and the ghosts of the night frightened them with their sad cries. A suspicious creature was spotted on the moon, along with devilish stones, successfully impregnating young Breton women. Gilles de Rais filled half of the duchy with children's blood, and the other half was populated by eccentric little animals. Ominous books were kept in temples and houses, swamps and wells led straight to hell, and even after sailing out to sea, it was easy to run into a ship of the dead or meet a resident of a drowned city. What is the origin of the horrors of Brittany and what is their originality? The book answers these questions.