Vault 914, a structure created by the Rakata species, was situated within the ruined Rakata machine chamber of the Tomb. This ancient prison resided on the planet of Belsavis. The Galactic Republic utilized Vault 914 to confine the six Sith Lords recognized as the Dread Masters. When the invasion of Belsavis occurred, Special Operations Group One arrived at the vault and tried to free the Dread Masters. However, Esh-kha warriors intervened, eliminating the Imperial soldiers and seizing the stasis chambers of the Dread Masters.
In the video game Star Wars: The Old Republic, Vault 914 is depicted as an Imperial phase on Belsavis. It serves as the location for the Imperial quest entitled "Tracking the Dread Masters."