The Bastion Museum is a museum of works by Jean Cocteau, on the harbour wall of Menton, on the French Riviera, in the Alpes-Maritimes department of France. The Bastion was built in the 17th century by Honoré II, Prince of Monaco. Cocteau restored the Bastion himself, decorating the alcoves, reception hall and outer walls with mosaics made from pebbles.
The Bastion Museum opened in 1966, three years after Cocteau’s death.
A new exhibition of Cocteau’s work is installed in the Bastion every year.