I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "Institutionally, the Normans combined the administrative machinery of the Byzantines, Arabs, and Lombards with their own conceptions of feudal law and order to forge a unique government. Under this state, there was great religious freedom, and alongside the Norman nobles existed a meritocratic bureaucracy of Jews, Muslims and Christians, both Catholic and Eastern Orthodox. The Kingdom of Sicily thus became characterized by Norman, Byzantine Greek, Arab, Lombard and "native" Sicilian populations living in harmony, and its Norman rulers fostered plans of establishing an Empire that would have encompassed Fatimid Egypt as well as the Crusader states in the Levant. One of the great geographical treatises of the Middle Ages, the "Tabula Rogeriana", was written by the Andalusian al-Idrisi for king Roger II of Sicily, and entitled "Kitab Rudjdjar" ("The Book of Roger")."? 

What proper name was part of the English translation of a famous book about landscape features and country boundaries?