Military constructions have a significant place here also. The military monuments are the Brouage Citadels, the Château d'Oléron Citadel, and Fort Louvois in Bourcefranc. And of course there is also Fort Boyard with its eventful history. This "stone ship" has become internationally famous thanks to a successful television game show.
Numerous Romanesque churches are also present throughout the region. They reveal that Oléron was in a state of turmoil when it became a British territory during the Middle Ages and during the wars of religion when the Protestants and Catholics were fighting.
Aside from these major historical monuments, there are many other sights well worth visiting in Marennes-Oléron such as fish locks and unusual ancient constructions. You can contemplate these sites and also a vast number of villages belonging to Marennes-Oléron's 15 districts.
If you want to find out more about Marennes-Oléon's history and heritage you should visit the museums where you might be in for a surprise or two!