Let's turn to a good source for info...or so I believe...IMDB!!!

IMDB - Kingdom of Heaven info

Plot Outline: "During the Crusades of the 12th Century, Balian of Ibelin (Bloom), a young blacksmith in Jerusalem, rises to protect his people from foreign invaders."

Hmm....another Troy?
If you check the cast listing, you will see a woman named Eva Green plays Sybilla... Didnt she marry Guy de Lusignan? And then make him King of Jerusalem after her son Baldwin V died?