Belsavis prison was a large-scale Republic prison complex located on the planet Belsavis. Built in the years before the Great Galactic War with the Sith Empire, the complex was built over and surrounding a series of ancient structures built by the Rakatan Infinite Empire in the age before the Republic, and it served two purposes: to imprison the Republic's worst and most powerful offenders, and to study and contain the horrors within the structures left behind by the Rakata.