Castle Ventress was Asajj Ventress's citadel on the planet Rattatak during the Clone Wars. It was her base of operations and a prison to many Rattataki. She kept the lightsabers of her dead Jedi Master, Ky Narec, housed within the halls of the citadel.
During the Clone Wars, Jedi Knight Obi-Wan Kenobi and ARC trooper Alpha-17 were held in the castle's prison, where they were tortured by Ventress after the Battle of Jabiim. They eventually escaped after stealing Ky Narec's lightsaber and one of Ventress's Ginivex-class starfighters.
- (First identified as Castle Ventress)