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.
Sicilian language
When the two most famous of Southern Italy's Norman adventurers, Roger of Hauteville and his brother, Robert Guiscard, began their conquest of Sicily in 1061, they already controlled the far south of Italy (Apulia and Calabria). It took Roger 30 years to complete the conquest of Sicily (Robert died in 1085). In the aftermath of the Norman conquest of Sicily, the revitalization of Latin in Sicily had begun, and some Norman and Norman-French words would be absorbed: but many etymologies are disputed and the only sure marker of a typical Norman word is its Scandinavian origin, such words do not exist in Sicilian.