Iron Citadel The Iron Citadel was a massive palace at the heart of the Royal District of Cinnagar . Home to the ruling monarch of the planet Empress Teta and the seat of government in ancient times , the Iron Citadel was conquered by the Krath cult during the Great Sith War and was a source of great terror to the populace of Empress Teta during the war . By the time of the Galactic Empire , the Iron Citadel had passed into legend , with many outside the system doubting that it ever existed at all . Nobles on the planet insisted that it formed the foundations of the modern Cinnagar Royal Palace , with others believing that it was buried deep beneath the modern cityscape and serving as a shrine for surviving Krath loyalists . History . Established as a residence for the royal family of Koros Major , the Iron Citadel was a gargantuan facility at the heart of the city of Cinnagar ' s Royal District . Named for its iron battlements , the Citadel was a testament to Koros ' military prowess as it had never fallen to enemy forces . The seat of the famed Empress Teta , it was from the Iron Citadel that Teta waged the Unification Wars and improved the political system within the entire Koros system . Having repelled invasion and infiltration by rebels , the Galactic Republic , Mandalorians , and the Jedi Order , the Iron Citadel was eventually violated by the Krath cult during the Great Sith War . Having murdered their parents and secured the throne for themselves , Satal and Aleema Keto formed the Krath cult and converted the Iron Citadel into their command center . From their war room , the Ketos initiated the Krath Holy Crusade that swept the system and the region . Satal Keto tortured Ulic Qel - Droma in the dungeons deep within the bowels of the Citadel , where political dissenters were ritualistically hanged from cavern walls . After Qel - Droma gained the trust of Aleema Keto , he was permitted access to other parts of the facility , though still a guest without permission to leave . While within the Citadel , Qel - Droma confronted Satal Keto on a balcony where he fought and killed the leader of the world . As the new joint leader of the Krath with his lover Aleema Keto , Qel - Droma commanded the forces within the Citadel and had its weapons systems upgraded to better defend the palace from Republic assault . When the Dark Jedi Exar Kun entered the Citadel unbidden , Qel - Droma dueled the former Jedi to a draw before the long dead Sith Lord Marka Ragnos named them Dark Lords of the Sith . The Iron Citadel ' s fate after this monumental occasion remained lost to history ; some accounts described the Citadel ' s destruction by the Republic forces during the ejection of the Krath from Empress Teta . Others claim that the Citadel formed the foundations of the modern Royal Palace at the heart of the Royal District , claiming the twisted block of iron at the heart of the Palace ' s gardens is a portion of the battlements from the Citadel ' s walls . Still others spread a rumor that the city had swallowed the Iron Citadel , and that it still stood intact beneath the city surface as a shrine for those Krath loyalists that still existed millennia removed from the Great Sith War . Despite being regarded as a legendary site , treasure hunters during the Imperial era believed that they could make a fortune by finding the remains of the Citadel and raiding its contents . Among the rumored artifacts to be housed within the ruins were the lightsaber crystal of Ulic - Qel Droma , the Krath translation talisman of Satal Keto , and an operational Basilisk war droid .