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 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 hunters 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 planet 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.

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

- Darth Tyranus and Darth Sidious

In the year 22 BBY, Count Dooku, leader of the Confederacy of Independent Systems and secretly the Sith Lord Darth Tyranus, engaged in a duel against the Jedi Obi-Wan Kenobi, Anakin Skywalker, and Yoda on the Outer Rim world of Geonosis during the opening battle of the galaxy-wide Clone Wars. Following the duel, Dooku traveled in his personal solar sailer to an abandoned tower in the Works district on Coruscant.

Once Dooku had arrived at the 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 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 to Darth Tyranus

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 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 Lord Vader

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 Star Wars: Episode II Attack of the Clones. The tower was first identified by its canonical name via the StarWars.com episode guide for "Sacrifice," the final episode of the animated television series Star Wars: The Clone Wars, released in 2014.

The tower was originally introduced in the Star Wars Legends continuity through the novelization 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.

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