Known for thousands of years
A few dozen years ago, a worked flint was found on the island, which suggests that human activity took place there in prehistoric times, more than 100,000 years ago. After all, what is a curiosity to humans today must surely have been so at the time. It's easy to imagine early man being fascinated by this untimely island, accessible on foot.
The Second World War
The island played an important role in the capture of Saint-Malo by the Germans during the Second World War. Its unique location off the coast of the town and the ease with which equipment could be brought in at low tide made it a prime location for a defence post. Bunkers were built for 4 firing posts and tanks for anti-aircraft guns, as well as several shelters. The Americans were able to take possession of the German post in August 1944, thanks to information on tide times.