The Heorem Complex, or SIS Headquarters during the Old Republic, was a kilometer-wide collection of buildings in the Senate District on Coruscant. It bordered Sah'c Town and contained the Heorem Skytunnel, which connected the two sectors.
- The Old Republic: Fatal Alliance (First appearance)
- Star Wars: The Old Republic—The Lost Suns
- The Old Republic: Annihilation
- (Mentioned only)
- Labyrinth of Evil (First mentioned)