It has now stood facing the sea for four centuries. Since its construction in 1618 by Prince Honoré II, the Bastion has undergone a few changes. Honoré II, also known as the builder prince, had this fortress built between land and sea in order to prevent marine invaders. It replaced the ramparts of the town of Menton, where the church of Saint-Michel is now located. It was not until 1639 that the construction was completed. In the 19th century, the city of Menton built a harbour and a pier in front of the Bastion. Since then, many projects have partially or entirely modified its appearance, such as the time when it was transformed into a Belle Epoque restaurant! However, the Bastion has retained its historic appearance. Jean Cocteau discovered the fort in 1957. Originally, he was only supposed to decorate the wedding hall. He ended up transforming it completely into a museum three years after his discovery. For this historical exhibition, artistic interpretations and precious testimonies are brought together to take you through the different occupations that the Bastion has undergone: paintings, drawings and photographs from all eras are exhibited alongside Jean Cocteau's project studies.