Île Madame (French pronunciation: [il madam]) is an island in the Charente estuary on the Atlantic coast of France joined to the mainland by a causeway.
The island has an area of four square miles and is unpopulated.
Hundreds of Catholic priests were held prisoner on the island during anti-clerical persecution in 1794.
A total of 254 died before the survivors were allowed to leave.
The priests who were held prisoner and those who died on the island are commemorated during a pilgrimage there each August.