The tower where Meleagant (Meliagrant) imprisoned Lancelot so that Lancelot could not make his scheduled duel with Meleagant at Arthur’s court. However, Meleagant’s sister freed Lancelot.
See also
Meleagaunce | The Legend of King Arthur
Meliagrant’s Castle | The Legend of King Arthur
Source
Vulgate Lancelot | 1215-1230
