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.
Sardinia
Sardinia is politically a region of Italy, whose official name is "Regione Autonoma della Sardegna" / "Regione Autònoma de Sardigna" (Autonomous Region of Sardinia), and enjoys some degree of domestic autonomy granted by a specific Statute. It is divided into four provinces and a metropolitan city, with Cagliari being the region's capital and its largest city as well. Sardinia's indigenous language and the other minority languages (Sassarese, Corsican Gallurese, Algherese Catalan and Ligurian Tabarchino) spoken on the island are recognized by the regional law and enjoy "equal dignity" with Italian.