County of Sicily was created by Robert Guiscard in 1071 for his younger brother Roger Bosso. Guiscard himself had received the title Duke of Sicily ("dux Siciliae") in 1059 from Pope Nicholas II as encouragement to conquer it from the Muslims. In 1061 the first permanent Norman conquest (Messina) was made and in 1071, after the fall of Palermo, the capital of the emirate and future capital of the county, Guiscard invested Roger with the title of count and gave him full jurisdiction in the island save for half the city of Palermo, Messina, and the Val Demone, which he retained for himself.
Roger II of Sicily the fleet by two Greeks, first Christodulus and then George of Antioch, whom he made in 1132 "ammiratus ammiratorum" or "Emir of Emirs", in effect prime vizier. (This title later became the English word admiral). Roger made Sicily the leading maritime power in the Mediterranean. Roger II had a kingdom where a Muslim scholar such as al-Idrisi could draw from a variety of intellectual traditions, because Sicily is positioned in the center of the Mediterranean and was a major stopping point for people traveling across the Mediterranean. Sicily had been run by several different groups in its history and Sicily