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,
Sardinia These were populated by Roman immigrants. The Roman military occupation brought the Nuragic civilization to an end, except for the mountainous interior of the island, which the Romans called "Barbaria", meaning "Barbarian land". Roman rule in Sardinia lasted 694 years, during which time the province was an important source of grain for the capital. Latin came to be the dominant spoken language during this period, though Roman culture was slower to take hold, and Roman rule was often contested by the Sardinian tribes from the mountainous regions. The east Germanic tribe of the Vandals conquered Sardinia in 456. Their rule