Panopticon
From Tardis Wiki, the free Doctor Who reference
The Panopticon was the main room of the Capitol on Gallifrey. The Eye of Harmony was secretly kept under the Panopticon. (DW: The Deadly Assassin) The Panopticon had six sides, as that number was revered on Gallifrey. (EDA: The Ancestor Cell) When Gallifrey's suns shined on the Panopticon, the interior would shine turqouise. (EDA: The Tomorrow Windows)
