The Sith Sanctum is the heart of the Sith Order on Dromund Kaas, where lords gather and where the Dark Council meets when not on the Imperial burial world of Korriban. The Emperor himself is believed to have chambers in the sanctum's lower levels, though none save the council and the Imperial Guard are allowed into its depths.
The original Citadel, like the Sith Academy on Korriban, was off-limits to everyone but the Sith. After the Citadel was rebuilt, the headquarters of the three Imperial ministries were added; more recently, the Mandalorian enclave was given a wing within the sprawling building. As a result, chambers in the Sith Sanctum have become an increased source of conflict and backstabbing among aspiring Sith. A place in the Sith Sanctum signifies aspirations to the Dark Council, or a prominent role in the direct governing of Dromund Kaas.