I'm working my way through a trilogy on that by John Julius Norwich - just got to Michael VIII Palaeologus and the fall of the Latin Empire.
I've found the whole history thus far fascinating.
I'm not normally a fan of Will Ferrell, but I thought it was good fun.
The actor who plays Olaf (the "Play JaJa Ding Dong!" guy) will be reading out the Icelandic scores for the Eurovision grand final on Saturday.
Over the years it's become apparent that there is a huge breadth and depth of knowlege on NSC, whether that comes from people's jobs, hobbies or just life in general.
So, what's your specialist subject? What's the thing, however niche, that you reckon you know more about than anyone else here...