Thestar chamber was a room inthe Doctor's TARDIS containing a smallgalaxy. TheSeventh Doctor stored theTime Lordprison planetNew Peerlessness in it after trapping theStruwwelpelters there. (AUDIO:Persuasion)

Vassarian'sBattle TARDIS had a star chamber via which it drew power from theEye of Harmony. TheDalek Time Strategist attempted to destroy the Eye through this room only for theWar Doctor to sever theTARDIS' connection to the Eye. (AUDIO:Eye of Harmony)

TheMechonoid City had a star chamber. When theEmperor of the Restoration came to the city, theMechanoid Queen took him to the chamber to analysethe Entity's rampage of theRestoration Empire. (WC:Planet of the Mechonoids)