Sicily of 2017, 750,000 Sicilians, 14.4% of the island's population, lived abroad. For lack of employment, every year many Sicilians, especially young graduates, still leave the island to seek jobs in richer Italian regions or in foreign lands. The politics of Sicily takes place in a framework of a presidential representative democracy, whereby the President of Regional Government is the head of government, and of a pluriform multi-party system. Executive power is exercised by the Regional Government. Legislative power is vested in both the government and the Sicilian Regional Assembly. The capital of Sicily is Palermo. Traditionally, Sicily gives centre-right results
Sicily in 552. In 535, Emperor Justinian I made Sicily a Byzantine province and, as in Roman times, Greek continued to be the predominate language spoken on the island. After the advent of Islam, Sicily was invaded by the Arab forces of Caliph Uthman in 652, but the Arabs failed to make any permanent gains and returned to Syria after gathering some booty. Raids seeking loot continued until the mid-8th century. Byzantine Emperor Constans II decided to move from the capital Constantinople to Syracuse in Sicily during 660. The following year, he launched an assault from Sicily against the Lombard Duchy