Château Bertaud, 16th-century château in Gassin, France

Château Bertaud is a neo-Gothic building with a three-story main block, one level of which is semi-underground. It has four round towers: two smaller ones at the north and west corners, a larger one to the south, and another larger tower detached to the east. The walls are pale grey render with rectangular windows, some with pale shutters, and a few arched openings near the base; the low-pitched roof is covered in terracotta-colored tiles with small chimney stacks.

The château is attested in the 16th century and was built by the lords of Bertaud, an arrière-fief of Grimaud from 1240. In 1912 the Whitehead company opened a torpedo factory on the estate, chosen for the discretion of the Gulf of Saint-Tropez; the site was nationalized in 1937 and remained state-run until 2003, when DCNS became a private-law company.

The Lyon painter Louis Janmot stayed at the château with his daughter Marthe and her husband, and made "very happy reproductions" of the site. His son Norbert kept the paintings of his best-known cycle, Le Poème de l'âme, at Bertaud and was the estate's last private owner.

The château stands in the Plaine de Bertaud by the shore at the bottom of the Gulf of Saint-Tropez, near the Foux crossroads and the coastal road to Saint-Tropez. The Pointe de Bertaud below it shelters boats at the mouillage de Bertaud. The building now lodges the director of the site's establishment, so it is seen from the road rather than visited inside.

The 1970 finds came during work at the torpedo factory, not from a dig at the château: coins, a Gallic amphora and pottery. Alphonse Donnadieu had earlier noted column bricks and eleven Roman coins at the site, which may point to a villa like that of Pardigon.