Kingdom of Sardinia
On 17 March 1861, law no. 4671 of the Sardinian Parliament proclaimed the Kingdom of Italy, so ratifying the annexations of all other Apennine states, plus Sicily, to the Kingdom of Sardinia. The institutions and laws of the Kingdom were quickly extended to all of Italy, abolishing the administrations of the other regions. Piedmont became the most dominant and wealthiest region in Italy and the capital of Piedmont, Turin, remained the Italian capital until 1865, when the capital was moved to Florence. But many revolts exploded throughout the peninsula, especially in southern Italy, and on the island of Sicily, because of the perceived unfair treatment of the south by the Piedmontese ruling class. The House of Savoy ruled Italy until 1946 when Italy was declared a republic by referendum. In this referendum the southern regions, including Sardinia, voted overwhelmingly in favor of the House of Savoy, with the results being 63.8% in favor of maintaining the monarchy.
Islam in Italy
The Italian island of Pantelleria (which lies between the western tip of Sicily and North Africa) was conquered by the Arabs in 700. The Arabs had earlier raided Roman Sicily in 652, 667 and 720 A.D.; Syracuse in the eastern end of the island was occupied for the first time temporarily in 708, but a planned invasion in 740 failed due to a rebellion of the Berbers of the Maghreb that lasted until 771 and civil wars in Ifriqiya lasting until 799. Arabian attacks on the island of Sardinia, less important than those on Sicily, failed to achieve its conquest although they induced its separation from the Roman Empire, giving birth to a period of Sardinian independence, the era of the "giudicati".