The Le-Mont-Saint-Michel is an island commune in Normandy, France. It is located about one kilometre (0.6 miles) off the country's northwestern coast, at the mouth of the Couesnon River near Avranches and is 100 hectares (247 acres) in area. As of 2018, the island has a population of 44. The The island has held strategic fortifications since ancient times and since the 8th century AD has been the seat of the monastery from which it draws its name. The structural composition of the town exemplifies the feudal society that constructed it.
On top, God, the abbey and monastery; below, the great halls; then stores and housing; and at the bottom, outside the walls, houses for fishermen and farmers.
The commune's position — on an island just a few hundred metres from land — made it accessible at low tide to the many pilgrims to its abbey, but defensible as an incoming tide stranded, drove off, or drowned would-be assailants. The Mont remained unconquered during the Hundred Years' War; a small garrison fended off a full attack by the English in 1433. The reverse benefits of its natural defence were not lost on Louis XI, who turned the Mont into a prison. Thereafter the abbey began to be used regularly as a jail during the Ancien Régime.Visited by more than 3 million people each year, Mont-Saint-Michel and its bay are on the UNESCO list of World Heritage Sites. Over 60 buildings within the commune are protected in France as monuments historiques. The original site was founded by an Irish hermit, who gathered a following from the local community. Mont Saint-Michel was used in the sixth and seventh centuries as an Armorican stronghold of Gallo-Roman culture and power until it was ransacked by the Franks, thus ending the trans-channel culture that had stood since the departure of the Romans in 460.