Capitol

From TARDIS Index File, the free Doctor Who reference.

The Capitol (also known as the Citadel) was the home of the Time Lords on Gallifrey. (DW: The Deadly Assassin)

The High Council resided in the Capitol and there was a transmat system that linked the Council's room to the Death Zone. Other Time Lord buildings on Gallifrey included the Time Lord Academy. (DW: The Five Doctors, The Sound of Drums)