Kingdom of Sicily at Misilmeri but the most crucial battle was the siege of Palermo, which led to Sicily being completely under Norman control by 1091. The Norman Kingdom was created on Christmas Day, 1130, by Roger II of Sicily, with the agreement of Pope Innocent II, who united the lands Roger had inherited from his father Roger I of Sicily. These areas included the Maltese Archipelago, which was conquered from the Arabs of the Emirates of Sicily; the Duchy of Apulia and the County of Sicily, which had belonged to his cousin William II, Duke of Apulia, until William's death in 1127;
Emirate of Sicily had been unified by Ayyub ibn Tamim, the son of the Zirid emir of Ifriqiyya. In 1068 he left Sicily, and what remained under Muslim control fell under two qadits: one, led by Ibn Abbad (known as Benavert in western chronicles) in Syracuse, and the other under Hammud in Qas'r Ianni (modern Enna). By the 11th century mainland southern Italian powers were hiring Norman mercenaries, who were Christian descendants of the Vikings; it was the Normans under Roger I who captured Sicily from the Muslims. The Norman Robert Guiscard, son of Tancred, conquered Sicily in 1060 after taking Apulia and