Coruscant abandoned tower The Coruscant abandoned tower was a skyscraper maintained during the Clone Wars by the Dark Lord of the Sith Darth Sidious in the Works , a district on the Core World and capital of the Galactic Republic Coruscant , that served as his secret hideout . Sidious would use the tower when he met his Sith apprentice Darth Tyranus , publicly known as Count Dooku , after the initiation of the Clone Wars . Sidious would use the tower again to conduct a dark side of the Force ritual when he and Dooku sensed that Grand Master Yoda of the Jedi Order was on Moraband , the ancient homeworld of the Sith . Sidious and Dooku planned to use the ritual to tempt Yoda , breaking his will and further weakening the Jedi Order from within . The abandoned tower later served as the training grounds of the Inquisitorius following the rise of the Galactic Empire . After Darth Vader familiarized himself with the Grand Inquisitor via Sidious , they traveled to the tower where Vader met the rest of the Inquisitorius , a dark side organization of Jedi hunter s tasked with eliminating remaining Jedi after their destruction . Design . The Coruscant abandoned tower was a derelict skyscraper located in the Works , an industrial district on Coruscant , the capital of the Galactic Republic situated in the Core Worlds . It had a secret hangar and a ceremonial chamber , donned with statues . In the early days of the Galactic Empire , the tower was given a refurbishment , which included the installation of a landing platform , a large central chamber , and a conference room . The exterior of the tower was in a neglectful state by the time of the Clone Wars , with areas of the structure being worn down and damaged . The base of the building was composed of three large fins that met at the mid - section of the structure . A large central and cylindrical pillar with a coned head protruded from the mid - section . Also in the mid - section was the secret hangar of the tower which had multiple access hatches that lifted upwards and downwards when opened and closed , and from one of the large fins extended a secondary smaller structure . During the Clone Wars , the smaller extension was connected to the main building by several ruined walkways . After the tower was refurbished , the exterior was upgraded and repaired . The secondary structure was transformed into a landing platform , and the multiple walkways were replaced by a singular pathway . History . The Clone Wars . Bringing good news . By the year 22 BBY , following a duel between Count Dooku , leader of the Confederacy of Independent Systems and secretly the Sith Lord Darth Tyranus , against the Jedi Obi - Wan Kenobi , Anakin Skywalker , and Yoda in a hangar on the Outer Rim world and Confederacy headquarters of Geonosis during the Battle of Geonosis , which ignited the galaxy - wide Clone Wars , Dooku traveled to the Works district on Coruscant in his personal solar sailer . Once Dooku had arrived at the abandoned tower ' s hangar , he was greeted by his Sith Master , Darth Sidious , and informed him that the war between the Galactic Republic and the Confederacy had begun . Sidious was pleased at the news , as he had achieved another milestone in his plan to destroy the Jedi Order and rule the galaxy and stated that everything was going according to plan . Dooku also had in his possession the plans for the " Ultimate Weapon , " as he believed that they would be much safer there with his master . Breaking the Jedi Order . By the closing stages of the Clone Wars in 19 BBY , Grand Master Yoda had embarked on a mission to Moraband in order to uncover the secrets of preserving one ' s consciousness after death , after Qui - Gon Jinn , a Jedi Master who died in 32 BBY , was able to communicate with Yoda , guiding him through a journey to preserve his identify after death , a journey which would lead Yoda to Moraband , the ancient homeworld of the Sith . Yoda also hoped to finally uncover the identity of the Sith Lord who had been manipulating the Jedi and had created the clone army for them . Apparitions of Sith Warriors conjured by the Force Priestesses alerted Sidious and Dooku of Yoda ' s presence on Moraband , and Dooku was informed by his super tactical droid , Commander Kraken , that his master was ordering him to Coruscant and meet with him . After arriving , Sidious greeted Dooku and led him to the tower ' s ceremonial chamber which was lined with statues positioned in a circle with a sacrificial altar basin at its center . Sidious then began a ritual , using Dooku ' s blood and Force - bond to connect with his former Jedi Master , Yoda , while also using Force lightning and Sidious chanting Balc , a Sith language . By creating the ritual , Sidious was able exploit the Force bond to reach through ripples through the Force to create Force Illusion s on Moraband , hoping to break Yoda ' s will and tear the Jedi Order from within . In the following illusions , Yoda saw himself back on Coruscant in the Works on board a LAAT / i with fellow Jedi Knight Anakin Skywalker , Clone Captain CT - 7567 , and a squad of clone trooper s who were tasked with a mission to the tower after detecting a rogue shuttle that infiltrated Coruscant ' s security grid , believing that Dooku was onboard . Initially confused , Yoda nevertheless ordered the mission to continue . Yoda believed that they were on the verge of discovering the mystery of the Sith , and that the Sith must not be able to escape , executing them if necessary . After the LAAT / i landed in the hangar of the abandoned tower , Yoda , Skywalker , Rex , and the clones discovered Sidious and Dooku in the ceremonial chamber . Dooku attacked the group with Force lightning , killing Rex and the clone troopers . Skywalker engaged Dooku in a lightsaber duel and was able to kill the Sith Lord , but not before Yoda exclaimed to Skywalker not to . Regardless , Yoda chased Darth Sidious to the outside of the tower , with Skywalker arriving outside shortly after . After dueling with Sidious , Skywalker was defeated and rendered unconscious . Sidious continued fighting Yoda , attempting to break Yoda ' s will by forcing him to choose between saving Skywalker , or learning Sidious ' true identity and stopping all he would do . Yoda chose the former , allowing himself to be struck by Force lightning but saving Skywalker . Sidious ended the ritual , ending the spiritual plane they were on , having failed to break Yoda ' s will . Defeated , Sidious stated that they would need more time to defeat the Jedi , while Yoda gained a new perspective about the Force that the Sith would not be able to foresee . Imperial Era . In 19 BBY after the rise of the Galactic Empire and the destruction of the Jedi Order , Darth Sidious , publicly the former Supreme Chancellor of the Galactic Republic Sheev Palpatine and subsequent Galactic Emperor of the Empire , founded the Inquisitorius , a dark side organization tasked with eliminating any remaining Jedi . After the leader of the Inquisitorius , the Grand Inquisitor , briefly dueled Sidious ' s new Sith apprentice , Darth Vader , Sidious acquainted them , and informed Vader of the Inquisitorius , which were located in the tower . The tower had been refurbished with a landing platform , a large chamber , a conference room , and was guarded by the Emperor ' s Royal Guard . There , as the Inquisitors trained with each other in the chamber , Lord Vader was given command of the Inquisitorius and was given the task of training them . After some time training with the inquisitors , Vader and the Grand Inquisitor conversed in a conference room , reviewing a list of possible Jedi survivors . They were tasked with tracking down Chief Librarian Jocasta Nu , who was considered by Sidious to be a high priority target . Unbeknownst to the Grand Inquisitor and revealed to Vader , Sidious wanted Nu alive due to her role in overseeing the Jedi Archives , believing that she had great knowledge ; knowledge that could serve his plans , or destroy everything he had built . Vader , after encountering and capturing Nu , killed her after discovering that she possessed a memory crystal with the names of Force - sensitive children , and stating to Vader that Sidious would use that list to eventually replace him . After informing his master that Nu had died in an attempt to escape , Vader destroyed the memory crystal . Behind the scenes . The Coruscant abandoned tower was created for the 2002 prequel trilogy film . The tower was first identified by its canon ical name via the StarWars . com episode guide for " Sacrifice , " the final episode of the animated television series " " , released in 2014 . The tower was originally introduced in the " Star Wars " Legends continuity through the of " Attack of the Clones " , released prior to the film in 2002 . In 2012 , it was identified as the " LiMerge Building " by the Legends novel " Darth Plagueis " .