but everyone in the Citadel,
Game of Thrones Season 7, Episode 1
A raven arrived from the CITADEL
this morning, Your Grace.
Game of Thrones Season 2, Episode 1
A maester of the Citadel, chained and sworn,
Game of Thrones Season 5, Episode 7
So, why did the Citadel take your chain?
Game of Thrones Season 3, Episode 7
The Citadel isn't Castle Black.
Game of Thrones Season 6, Episode 3