Castle Tsabak was the massive palace on Dreven used by the Interim Ruling Council and later Emperor Bacharan Valak as the seat of Imperial power. The Council was situated within the Castle, and Valak's throne room would later be built atop the Castle. As the years drew on, and the Imperial captial was relocated to Guritsan, and later Imperial Center after its capture by Imperial forces, Castle Tsabak would fall into a state of decay, occupied only by a few nobles in the Imperial hierarchy. From SW1ki, a Wikia wiki.