In La Tavola Ritonda, the castle owned by the Wise Damsel, who ensnared King Meliadus (Meliodas), Tristan’s father. Meliadus remained in the Tower of Enchantments until his nobles, at the direction of Merlin, rescued him.
Many years later, Tristan and Isolde lived there for a time after they fled Mark’s court. Mark eventually stole her back.
In the Prose Tristan, it is called the Rock of the Cornishwoman.
See also
Wise Damsel’s Rock | The Legend of King Arthur
Source
La Tavola Ritonda | 1325–1350