While based on this island, the geographer Muhammad al-Idrisi compiled a world map known as the Tabula Rogeriana. (10[1])This island’s Kalbid dynasty dwindled shortly before a conquest led by Robert Guiscard, (10[1]-5[1])which put (10[1])the Hauteville (10[1])family (10[3])in power. (10[2])A rebellion on this island against the unpopular king Charles of Anjou in Easter 1282 became known as this island’s namesake Vespers. In the 19th century, a kingdom known as “two” of this island formed when it merged with the Kingdom of Naples. Byzantine, Arab, and Norman influences can be seen in this island’s Palermo Cathedral. For 10 points, the mafia remains powerful on what largest Italian island? ■END■ (10[1])