History of Sardinia
In the Early Middle Ages, through barbarian movements, the waning of the Byzantine Empire influence in the western Mediterranean and the Saracen raids, the island fell out of the sphere of influence of any higher government. This led to the birth of four kingdoms called "Judicates" (Latin: "Judicati"; Sardinian: "Judicados") in the 8th through 10th centuries. Falling under papal influence, Sardinia became the focus of the rivalry of Genoa and Pisa, the Judicates and the Crown of Aragon, which eventually subsumed the island as the Kingdom of Sardinia in 1324. The Kingdom was to last until 1718, when it was ceded to the Piedmontese House of Savoy; later, in 1861, it would thus become the Kingdom of Italy and finally in 1946 the Italian Republic.
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.