LiMerge Building The LiMerge Building was Darth Sidious ' s secret hideout on Coruscant . The building was located in The Works industrial district , in close proximity to the Senate District and the crash - site of the " Invisible Hand " . Design . This building , constructed as the headquarters for LiMerge Power some three centuries prior to its use by Darth Sidious , was designed as a weapons manufacturing facility . Additionally , it was believed to have served as the corporate headquarters for the factories that surrounded it . The top two - thirds of the building appeared to be little more than an unadorned pillar with a rounded summit , and the superstructure of the lower portion was supported by massive fins reinforcing a circular base . Several docking bays were located on the level where these fins met the structure itself . Permaglass windows and skylights dotted the exterior of the building . History . Darth Sidious was known to have used the LiMerge Building as his Sith headquarters during the training of Darth Maul , and perhaps even before that time . Following Maul ' s defeat on Naboo , Count Dooku became Sidious ' s new apprentice , and used the LiMerge Building as his base of Sith operations . Following his escape from Geonosis , Dooku returned to his Master in their hideout on Coruscant to report the onset of the Clone Wars . He also brought Sidious the plans for the Separatist Ultimate Weapon . With Dooku leading the Confederacy of Independent Systems during the war , he was known to bring some of his acolytes to the LiMerge Building , though none realized its connection to Sidious . Following the assassination of Senator Viento , Quinlan Vos met with Dooku here along with Tol Skorr and Khaleen Hentz . It was a mention of this location by the reformed Vos that clued Tholme in to the true nature of the building , which in turn led to an investigation of the structure , carried out by Commander Valiant , Captain Dyne , and Jedi Master Mace Windu . Their search for Darth Sidious led through the building and into the downlevel tunnels , which they realized connected not only to areas of the Senate District , but also to the lower levels of 500 Republica . Getting to know this , the Jedi became certain that Darth Sidious was in fact a member of Palpatine ' s inner circle . Due to the large amounts of footprints disguising Sidious ' footprints , as well as a Separatist attack on the planet , Valiant and Dyne were the only ones remaining to investigate , as Mace Windu had to break off from the investigation due to the recent events . Dyne and Valiant eventually deduced only one organic lifeform within the area they lost Sidious ' tracks at via basic holoradio channels ( the military channels having been blocked out ) , and then entered an elevator to locate Sidious . However , they were killed in an ambush by Geonosians before entering the area Sidious was suspected of being at , although Dyne managed to live long enough to get a glimpse of Sidious when he inspected the damage , realizing that Sidious was in fact Palpatine himself . Behind the scenes . " Coruscant and the Core Worlds " introduced the Factory District and placed both the Grungeon Block and the LiMerge Building in that district , but later sources moved them to the Works .