Constantinople not Istanbul. Third age total war and Stainless steel are both amazing mods.
keep an eye on the third age forum for the next release which is guna be awesome. If you love historically accurate mods try stainless steel its probably the best historically accurate mod for medieval and is pretty fun too. Europa barbarorum 2 is in production for medieval 2 total war. I <3(love) Byzantine History and early Greek history aswell as the decline of the Roman empire in the west. The crusades is also a subject in history I like.