Sicily and encouraged the growth of smallholdings, undermining the dominance of the latifundia. The Arabs further improved irrigation systems. The language spoken in Sicily under Arab rule was Siculo-Arabic and Arabic influence is still present in some Sicilian words today. Although the language is extinct in Sicily, it has developed into what is now the Maltese language on the islands of Malta today. A description of Palermo was given by Ibn Hawqal, an Arab merchant who visited Sicily in 950. A walled suburb, called the Al-Kasr (the palace), is the centre of Palermo to this day, with the great Friday mosque
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