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,
Charles Albert of Sardinia September there was a grand military parade, after which the Duc d'Angoulême decorated Charles Albert with the Cross of the Order of Saint Louis. With the dissolution of the expeditionary force, Charles Albert travelled from Seville to Paris, arriving on 3 December 1823. In the French capital he participated in balls, receptions, and parties, and developed a close relationship with Marie Caroline, widow of the Duc de Berry. On 15 December, King Louis XVIII held a grand reception for the victors of Trocadero, at which Charles Albert was among the guests of honour. King Charles Felix of Sardinia decided that,