Château Turpault, Medieval-style castle in Quiberon, France

Château Turpault is a manor in Anglo-medieval style on the Beg-er-Lann headland, built 1904–1910 for Georges Turpault. Its light grey-beige stone main block has a steep grey roof, two cylindrical towers with dark conical caps, a taller crenellated square tower behind, and a lower crenellated wing; arched windows, a recessed doorway and a crenellated balcony face the sea.

The castle was built between 1904 and 1910 by Georges Turpault, a textile manufacturer from Cholet. During World War II it was occupied, and two bunkers were added to the site.

Georges Turpault, a yarn merchant from Cholet, named the house "le château de la mer", but the name of its owner stuck instead. The residence was meant to recall old English castles, and the German occupiers later integrated it into their Atlantic Wall fortifications. It remains a private summer home, not open to visitors.

The residence is private and not open to visitors; it is best seen from the coastal paths of the Côte Sauvage on the Quiberon peninsula. Remains of the German concrete blockhouses built at the base of the castle on the sea side are still visible. The castle is occupied by its owners in summer.

Georges Turpault, a yarn merchant from Cholet who made his fortune in textiles, named the residence "le château de la mer" before his own surname stuck. The German army later incorporated the complex into its Atlantic Wall fortifications, and concrete blockhouses remain at the base of the castle on the sea side.