Corsica has a population of 322,120 inhabitants (January 2013 estimate). At the 2011 census, 56.3% of the inhabitants of Corsica were natives of Corsica, 28.6% were natives of Continental France, 0.3% were natives of Overseas France, and 14.8% were natives of foreign countries. The majority of the foreign immigrants in Corsica come from the Maghreb (particularly Moroccans, who made up 33.5% of all immigrants in Corsica at the 2011 census), and from Southern Europe (particularly Portuguese, 22.7% of immigrants on the island), and Italians (13.7%). Italian was the official language of Corsica until the 9th of May of 1859, when it
Corsica was divided in "pagi", which in the Middle Ages became the "pievi", the basic administrative units of the island until 1768. During the diffusion of Christianity, which arrived quite early from Rome and the Tuscan harbors, Corsica was home to many martyrs and saints: among them, the most important are Saint Devota and Saint Julia, both patrons of the island. Corsica was integrated into Roman Italy by Emperor Diocletian (r. 284-305). In the 5th century, the western half of the Roman Empire collapsed, and the island was invaded by the Vandals and the Ostrogoths. Briefly recovered by the Byzantines, it