Any good Citadel based or Maester fics?

So I haven't seen many fics that say much about the Maesters or the Citadel in general. I've only really seen a few chapters from Qyburn's perspective in Reinventing the Wheel, an SI fic about a new son of Tywin born between the twins abd Tyrion. But it's pretty rare in general for some reason. And though I like SI fics the most, I would honestly take anything from this kind of perspective.