A little while ago, I had a history project, and chose to do mine on the Hashshashin. (If you look that up, you should find my paper here). Along with a paper, though, I had to make something physical, and decided to build a little bit of Tyre, and stage it to be one of the actual assassinations carried out by the Hashshashin; the Assassination of Conrad of Montferrat.
(I actually took pictures a while ago, but never got around to posting them.)
I also included lotsa little hints at the Assassin's Creed games. Enjoy!