The Imperial central command situated on Mimban served as the governmental hub for the five mining settlements, and also contained the detention center. This structure was repurposed from ancient ruins constructed by an indigenous Mimban species, although the Imperial forces attributed its creation to a long-vanished race, dismissing the Mimban natives and Coway as the builders.
The building was a gray stone ziggurat, constructed entirely of gray stone, both internally and externally. To add some flair to the otherwise austere environment, the Captain-Supervisor's offices were sumptuously adorned with furs, both genuine and synthetic. These offices also featured a concealed Viewscreen behind a fake wall. At the back of the building were holding cells used for those who committed minor crimes, while another section, situated near an exterior wall, had been modified into a maximum-security prison.
During 2 ABY, Captain-Supervisor Grammel's administration was based at this headquarters. For a short time, Princess Leia Organa alongside Luke Skywalker were incarcerated within the jail located at the facility.