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.
Sardinian people
The Spanish era ended in 1713, when the whole island was ceded to the Austrian House of Habsburg, followed with another cession in 1718 to the Dukes of Savoy, who assumed the title of "Kings of Sardinia". During this period, Ligurian colonists, escaped from Tabarka, settled on the little islands of San Pietro and Sant'Antioco (at Carloforte and Calasetta), in the south-west area of Sardinia, bringing with them a Gallo-Italic dialect called "Tabarchino", still widely spoken there. Then, the Piedmontese Kingdom of Sardinia annexed the whole Italian peninsula and Sicily in 1861 after the Risorgimento, becoming the Kingdom of Italy.
Since 1850, with the reorganization of the Sardinian mines, there had been a considerable migration flow from the Italian peninsula towards the Sardinian mining areas; these mainland miners came mostly from Lombardy, Piedmont, Tuscany and Romagna. According to an 1882 census realised by the French engineer Leon Goüine, in the south-western Sardinian mines worked 10.000 miners, one third of which coming from the Italian mainland; most of them settled in Iglesias and "frazioni" .