Inquisitorius Headquarters

"Welcome home, Lord Tyranus."

- Darth Sidious

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 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 hunters tasked with eliminating remaining Jedi after their destruction.

Design
The Coruscant abandoned tower was an old skyscraper located in the Works, an industrial district on Coruscant. 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 conference room, and a large central chamber.

Bringing good news
"I have good news for you my lord. The war has begun." " Excellent. Everything is going as planned."

- Dooku to Sidious

In the year 22 BBY, following a duel between Count Dooku, leader of the Confederacy of Independent Systems, and the Jedi Obi-Wan Kenobi, Anakin Skywalker, and Yoda in a hangar on Geonosis during the Battle of Geonosis, which began the galaxy-wide Clone Wars, Count Dooku, secretly the Sith Lord Darth Tyranus, 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, with Dooku informing his master that the war between the Galactic Republic and the Confederacy of Independent Systems 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
"Sir, you have been ordered to go to Coruscant immediately.''" "''Tell Lord Sidious I am on my way."

- Kraken informs Dooku that his presence is requested

By the closing stages of the Clone Wars, 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 more than a decade ago, 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, with Dooku informed by his super tactical droid, 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 soon 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 Illusions 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 troopers 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
"Come with me."

- Darth Sidious to Vader to show him the Inquisitorius at the tower

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 now 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 first appeared in Star Wars Legends novelization of Star Wars: Episode II Attack of the Clones on April 23, 2002, while the film released on May 16 of the same year. The Coruscant abandoned tower also appeared in the now Star Wars Legends novel Darth Plagueis released on January 10, 2012 where it was identified as the LiMerge Building. The Coruscant abandoned tower appeared in the final episode of Star Wars: The Clone Wars in the episode "Sacrifice", which was released on March 7, 2014. It was identified as the Coruscant abandoned tower in the corresponding episode guide on StarWars.com in the concept art gallery.

Appearances

 * Star Wars: Episode II Attack of the Clones
 * Darth Vader: Dark Lord of the Sith 6: The Chosen One, Part VI
 * Darth Vader: Dark Lord of the Sith 7: The Dying Light, Part I
 * Darth Vader: Dark Lord of the Sith 7: The Dying Light, Part I