Download The Crusades!

After the defeat at Manzikert in 1071 the new Byzantine emperor Alexios Komnenos has appealed to Western Christendom for help against the Selchuk Turks; in response the Holy See has declared this to be God's will and in 1096 Crusader armies arrive in West

Credits: Lokolus, DIE Inc., Fiend777Fits (for help & criticism), LeGrandMogol (medieval era end), "Unknown" (for the map, uploaded by karlX).
http://forums.civfanatics.com/showthread.php?t=252554