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 of the multi-ethnic County and subsequent Kingdom of Sicily, until those who had not already converted were expelled in the 1240s. Until the late 12th century, and probably as late as the 1220s, Muslims formed a substantial portion of the island's population. Their influence remains in some elements of the Sicilian language, as well as surnames and locations. In 535, Emperor Justinian I returned Sicily to the Roman Empire, now ruled from Constantinople exclusively. As the power of what is now known as the Byzantine Empire waned in the West, Sicily was conquered by the Rashidun Caliphate during the reign