Brought shame on the Citadel
with his repugnant experiments.
Game of Thrones Season 4, Episode 2
And if you tell every maester
in the Citadel
Game of Thrones Season 7, Episode 5
Do you know how many steps
there are in the Citadel?
Game of Thrones Season 7, Episode 5
The Citadel doesn't admit women.
Game of Thrones Season 6, Episode 3
but everyone in the Citadel,
Game of Thrones Season 7, Episode 1