Merlin recs, anyone?

I've been away from the Merlin fandom for a while. Now that I'm getting caught up on season three as it's being played in the US, I'm sniffing around for Merlin fic.

What do you recommend?

I love Merlin-Wears-A-Dress stories and stories that do their homework on the middle ages. I've found I'm not fond of modern AUs in this fandom (no, not even Drastically Redefining Protocol -- it's the time period that I enjoy).

Any suggestions? I'm pretty sure that, having been gone for so long, I've missed all (or most) of the classics.