Historic house of Knight Bertrand du Guesclin, constable of the armies of the King of France (14th century) and his wife Tiphaine de Raguenel, a famous astrologer who used to foretell the destiny of the world in the stars. http://en.normandie-tourisme.fr/pcu/logis-tiphaine/le-mont-saint-michel/fiche-PCUNOR050FS000SR-2.html?iDD=6