
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