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.
History of Sardinia
In 240 BC, in the course of the First Punic War, the Carthaginian mercenaries on the island revolted and gave the Romans, who some years earlier had defeated the Carthaginians in the naval battle of Sulci, the opportunity to land on Sardinia and occupy it. In 238 BC the Romans took over the whole island, without meeting any resistance. They took over an existing developed infrastructure and urbanized culture (at least in the plains). Along with Corsica it formed the province of Corsica et Sardinia, under a praetor. Together with Sicily it formed one of the main granaries of Rome until the Romans conquered Egypt in the 1st century BC.