Thanks to the singular alliance between a natural site and architects, the Mont-Saint-Michel constitutes a unique aesthetic achievement. A unique ensemble where an abbey and a fortified village coexist in the tight space of an island. It is the unique layout of the buildings that gives an unforgettable silhouette to this exceptional testament to medieval civilisation. At the frontier between Normandy and Brittany, the “mount Saint-Michel at the peril of the sea” of the Middle Ages still fascinates visitors of the 21st century.