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.
Province of Medio Campidano
The formation of the province was announced in 2001 by the Autonomous Region of Sardinia and it officially became a province in May 2005 from a section of the province of Cagliari. On 6 May 2012 the regional referendums of Sardinia took place regarding the abolition of certain provinces and a variety of other matters. The suggestion of reforming or abolishing certain provinces in Sardinia was approved by the Regional Council of Sardinia on 24 May 2012. Due to this, the province of Medio Campidano was ordered to form a new administrative body or be abolished on 1 March 2013, but this expiry date for constitutional changes was extended to 1 July 2013. It later formed a new administrative body.