The Château de Puymartin is a castle in the commune of Marquay, in the Dordogne département of France, located between Sarlat and Les Eyzies.

People claim to have seen the ghostly form of a young woman dressed in white who appears to the inhabitants of Puymartin when night falls and that she moves softly and without sound. This spectral figure is known among locals as "la Dame Blanche" – the white lady.

La Dame Blanche is believed to be a ghost of Thérèse de Saint-Clar who lived in the 16th century. Her husband Jean de Saint-Clarin found her the arms of another man and promptly locked her in a small room at the top of the tower where she remained for fifteen years! She received her food through a little hatch in the ceiling, which is still visible today.

Thérèse died in this room and her husband refused her a proper burial, entombing her instead within a wall of her prison. It is likely that her body, or rather, her bones are still there today.

It is said that Jean had his wife’s lover executed immediately and that he was hung from a branch of a tree where Thérèse would be able to see.