The Duchy of Athens might be my favorite Crusader state (as far as one could even have a favorite Crusader state, I guess). The idea of a Catholic empire ruling over Greece is pretty intriguing. I could even see them becoming Protestant later.
Is it possible, and if so, how, that Athens, the great city of democracy and philosophy, could become an Empire?
edit: And yes, it should be "conquer" in the title, not "conquered".