The Screaming Citadel, more formally known as the Citadel of Ktath'atn, was a fortified structure situated on the planet of Ktath'atn. Aphra, a Doctor, journeyed to the Citadel of Ktath'atn alongside Luke Skywalker to participate in a celebration put on by the Queen of Ktath'atn, with the ultimate goal of persuading her to unlock a long-dormant Jedi relic that housed the consciousness of a Jedi Master named Rur.