Sardinia world (22 centenarians/100,000 inhabitants). Sardinia is the first discovered Blue Zone, a demographic and/or geographic area in the world with an oversize concentration of centenarians and supercentenarians. In 2016 there were 50,346 foreign national residents, forming 3% of the total Sardinian population. The most represented nationalities were: Sardinia's most populated cities are Cagliari and Sassari. The Metropolitan City of Cagliari has 431,302 inhabitants, or about ¼ of the population of the entire island. Eurostat has identified in Sardinia two Functional Urban Areas: Cagliari, with 477,000 inhabitants, and Sassari, with 222,000 inhabitants. Sardinia is one of the five Italian autonomous regions,
Kingdom of Sardinia Piedmont-Sardinia, or even the Kingdom of Piedmont to emphasise that the island of Sardinia was of secondary importance to the monarchy. The formal name of the entire Savoyard state was the "States of His Majesty the King of Sardinia". Its final capital was Turin, the capital of Savoy since the Middle Ages. The kingdom initially consisted of the islands of Corsica and Sardinia, sovereignty over both of which was claimed by the Papacy, which granted them as a fief, the "regnum Sardiniae et Corsicae" ("kingdom of Sardinia and Corsica"), to King James II of Aragon in 1297. Beginning in 1324,