The Fatimid empire was a highly sophisticated and cosmopolitan regime that flourished from the beginning of the 10th to the end of the 12th century. Under the enlightened rule of the Fatimid Caliphs, Cairo was founded as the nucleus of an imperium that extended from Arabia in the east to present-day Morocco in the west. Dynamic rulers like the the fourth caliph al-Mu'izz (who conquered Egypt and founded his new capital there) were remarkable not...