Abstract: Circé in the Ovide moralisé assumes the double role of both a didactic and a poetic object. As an allegorical support and a representation of the enchantress in medieval literature, she plays the central role in episodes where poetry exhibits fantastic traits, and in which myths attempt to gradually link the figure of the witch to the one of the Devil. The evolution of Circe enables us to highlight late medieval questions concerning magic and the figure of the witch.