Expulsion of the Jews from Sicily in professions such as philosophy, medicine, artisanal pursuits, and farming. The exact number of Jews in Sicily at the time of expulsion is not certain, However, some have put the number of Jewish refugees at 36,000. Also, in 1492, it is known the Jewish populations of Palermo, Messina, and several other cities were considerable, and that there were "Giudeccas", or Jewish settlements, in over 50 places in Sicily, ranging in anywhere population from 350 to 5,000. At their height, Jewish Sicilians probably constituted from five to eight percent of the island's population. Muslims had ruled much of the Iberian Peninsula
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