Republic Executive Building The Republic Executive Building — also known as the Senate Office Building , Executive Annex Dome and Senate Annex — was a large , domed administration building that also functioned as a spaceport in Galactic City ' s Senate District on Coruscant . Sponsored by the Financial Appropriations Committee and constructed several years before the Clone Wars , the Executive Building was the official residence and principle workplace of Supreme Chancellor Palpatine , the leader of the Galactic Senate of the Republic . Under the Galactic Empire , Palpatine resided in the Executive Building for a time as Emperor of the Galaxy before relocating to the much larger Imperial Palace . History . Conception . In the midst of the Crisis on Naboo in 32 BBY , then - Senator Palpatine was disappointed in the Supreme Chancellor ' s office , believing that the head of state of the Galactic Republic required a workplace that better reflected his position as leader of the Senate . The view of Coruscant ' s cityscape from the Senate Building appealed to Palpatine , who had secretly plotted to replace Finis Valorum as chancellor , but the office itself was too small for his liking . Convinced that no amount of remodeling would satisfy his expectations , Palpatine envisioned the construction of a new building — an executive office building that would serve as the nerve center for his future regime . Secretly , Palpatine ' s true identity was Darth Sidious , a Sith Lord affiliated with the Sith Order , an ancient cult of dark side Force - wielders committed to the downfall of the Jedi Order . Soon after Palpatine ' s election to the highest office in the state , the Financial Appropriations Committee proposed to finance the construction of a new building that would serve as the executive branch ' s principle workplace , to which the Chancellor approved . Hence , the Republic Executive Building was created in the Senate District , adjacent to the Senate Building , and also served as a docking facility with several tiered hangar levels . In addition to its executive role , the new structure was an annex to the Senate ' s delegation offices , and also included private rooms and an office designed according to Palpatine ' s specifications . For more than a decade , Chancellor Palpatine resided in the Executive Building , all the while plotting to bring about the re - ascendancy of the Sith as rulers of the galaxy . The last years of the Old Republic . At the height of the Separatist Crisis in 22 BBY , Supreme Chancellor Palpatine held several meetings with the Jedi High Council and Loyalist Committee in his office at the Executive Building , discussing options aimed at the preservation of the Galactic Republic . Around the same time , the Jedi Knight Obi - Wan Kenobi sent a report to the Chancellor ' s office , in which he revealed his discovery of a secret droid army , built by the Separatists in preparation for a civil war . At the behest of Vice Chair Mas Amedda , Palpatine secured emergency powers with the Senate ' s majority support , and then activated a clone army in response to the Separatist Rebellion . As the Clone Wars erupted between the Galactic Republic and the Confederacy of Independent Systems , the Chancellor spent much of his time in the Executive Building , where he coordinated many strategies with the Jedi whom he appointed as generals in the Grand Army of the Republic . Early in the conflict , the bounty hunter Cad Bane led a team of mercenaries and assassins on a mission to rescue Ziro Desilijic Tiure , the incarcerated uncle of a Tatooine crime lord known as Jabba the Hutt . In order to achieve their objective , the bounty hunters infiltrated the Senate Building and took several senators hostage , killing numerous Senate Commandos in the process . They also disabled the power grid in the Republic Executive Building , causing the structure to initiate an automatic lock - down . Chancellor Palpatine , trapped in his office and unable to communicate with the outside world , was contacted by Bane and coerced into releasing Ziro in exchange for the senators ' lives . A clone squad of Coruscant Guard shock troopers were deployed to the building for the Chancellor ' s protection , but the hunters ultimately escaped from Coruscant with Ziro . As the Clone Wars progressed , a Zillo Beast — believed to be the last of a species long since considered extinct — was captured and transferred from Malastare to Coruscant on the orders of Chancellor Palpatine . Fascinated by the beast ' s armor - like skin that was impervious to lightsabers , Palpatine had it deposited in the Republic Science and Technical Center for further analysis . The creature escaped , however , and proceeded on a rampage through the city . Dozens of buildings path were damaged and many civilians were killed as the zillo beast tracked Palpatine to his office in the Republic Executive Building . The Chancellor attempted to escape in his H - 2 executive shuttle , but the zillo beast caught the starship in its grip . A squadron of LAAT gunships , led by several members of the Jedi Council , arrived on the scene and promptly killed the beast with gas bombs containing Malastarian fuel that was toxic to the creature . Shortly after the Battle of Coruscant in 19 BBY , the Jedi generals Obi - Wan Kenobi and Anakin Skywalker escorted Chancellor Palpatine to the Executive Building ' s docking area where they met with Jedi Master Mace Windu and a retinue of Loyalist politicians . Meanwhile , on the lower levels , a clandestine organization of senators known as the Republic Group met with the smuggler Tobb Jadak in order to use his ship , the " Stellar Envoy " for a covert mission . Utilizing an encrypted device aboard the ship , the senators safely departed the Executive Building before a group of Coruscant Guard clone shock troopers could detain them . In the days following of the Battle of Coruscant , Palpatine met with Skywalker in his office at the Executive Building and appointed the Jedi Knight as his personal representative on the Jedi High Council . The Council allowed the appointment to stand , but only for the purpose of using Skywalker to spy on the activities of the Chancellor , whose motives they had come to distrust . The Executive Building was also the site where the Delegation of 2000 made its existence known to the Chancellor . Composed of a group of senators who disagreed with the numerous amendments to the Constitution , the Delegation confronted Palpatine in his office with a petition of two thousand like - minded delegates that advocated for a peaceful conclusion to the war . The Chancellor assured them of his support for a restoration of democracy , although the vagueness of his intentions and dismissive attitude toward their questions left the Delegation of 2000 more concerned for the future of the Republic . Showdown in the Executive Building . With the death of General Grievous at the Battle of Utapau , Master Windu and three of his fellow members on the Jedi Council — Agen Kolar , Kit Fisto and Saesee Tiin — left the Jedi Temple and headed to the Executive Building . Moments before their departure , Skywalker told Windu about his discovery of Palpatine ' s secret identity as Darth Sidious , the Dark Lord of the Sith who engineered the Separatist Crisis and the Clone Wars . When the Jedi confronted the Chancellor in his private office , Sidious swiftly struck down three of the Masters and engaged Windu in a lightsaber duel , resulting in a showdown between the Jedi and Sith in the Republic Executive Building . Mace Windu ' s death at the hands of Darth Sidious not only affected the fate of the Galactic Republic and the Jedi Order , but also caused Anakin Skywalker ' s fall to the dark side of the Force . Driven by the premonition of his secret wife ' s death in childbirth and convinced that Sidious had the power to restore life , Skywalker attacked Windu in defense of the Chancellor , making him complicit in the Jedi Master ' s demise . Though remorseful for his actions , Skywalker relented to Sidious ' s offer and joined the Sith as the Dark Lord ' s new apprentice . As the newly - christened Darth Vader led the 501st Legion on a to purge the Jedi Temple of all inhabitants , Sidious remained in the Executive Building where he issued Order 66 to the clone soldiers dispersed throughout the galaxy , causing them to betray and murder their Jedi officers without question or debate . Without the Jedi Order , Palpatine ' s opponents in the Senate were powerless to prevent his complete takeover of the state . In a speech that condemned the " Jedi Rebellion " and the inefficiencies of the Old Republic , Palpatine proclaimed the formation of the first Galactic Empire , ruled by himself as emperor . Galactic Empire . In the months following the rise of the New Order , Emperor Palpatine no longer occupied the Executive Building . His official residence had been moved to the heavily - renovated Imperial Palace , formerly known as the Presidential Palace in the Old Republic . Despite the relocation , the Emperor still utilized his former office on occasion , mainly to meet with members of the Imperial Senate and other guests . The building also contained secret chambers for the purpose of interrogation via torture — an experience that Padawan Dama Montalvo endured at the hands of Darth Vader , who sought information on the whereabouts of Obi - Wan Kenobi . Layout . Erected within the Legislative Borough of the Senate District , the Republic Executive Building was built over the old foundations of the Coruscant Spaceport , a docking facility that existed during the Cold War . A massive dome , situated at the center of several broad thoroughfares , was the largest of several annexes in close vicinity to the Senate Building . Designed to complement the Great Rotunda , the Executive Building alleviated the cramped office conditions in the Senate Building caused by the increased number of seats doled out to new member worlds . Aside from its status as a political administration facility , the Executive Building contained several levels of hangar bays and landing pads for the official transports of government officials . The Supreme Chancellor ' s offices were located in the higher levels of the building , from which Palpatine conducted meetings with the Loyalist Committee , delegation leaders and members of the Jedi High Council . Along the exterior of the building , enhanced security measures ensured the safety of the Chancellor from potential terrorist attacks and assassination attempts . In addition to the Chancellor ' s Suite , several prominent senators also had their own offices within the building , including Padmé Amidala of Naboo , Bail Organa of Alderaan , and Mee Deechi of Umbara . The highest tier of the Executive Building ' s multi - level landing dock was reserved for senators and delegation leaders with offices in the building . Executive shuttles , speeders and gunships were contained in the docking area in order to accommodate guests , ranging from ambassadors to planetary rulers and members of the Jedi Order . Attendant droids , load lifter s and pilot automatons were assigned to assist Republic officials on each level ; larger vessels , such as diplomatic cruisers , star skiffs and light stock freighters could dock in the wider landing bays on the lower tiers . The main docking level deposited visitors into the cavernous , open - air atrium that led deep into the Executive Building ' s labyrinthine interior .