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,
Independence Republic of Sardinia Sale. Independence Republic of Sardinia Independence Republic of Sardinia (, iRS) is a Sardist, left-wing nationalist and social-democratic and non-violent separatist political party in Sardinia. The party, whose long-time leader is Gavino Sale, supports the establishment of a "Republic of Sardinia" and its independence from Italy. The party emerged in 2001–2002 by the merger of "Su Cuncordu", a separatist platform animated by three Sardinian intellectuals living in Rome (Franciscu Sedda, Frantziscu Sanna and Franciscu Pala), and a splinter group from Sardinia Nation (SN) led by Gavino Sale. The latter and his followers left SN because of its alliance with the