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 of cheese, considering that half of the sheep milk produced in Italy is produced in Sardinia, and is largely worked by the cooperatives of the shepherds and small industries. Sardinia also produces most of the pecorino romano, a non-original product of the island, much of which is traditionally addressed to the Italian overseas communities. Sardinia boasts a centuries-old tradition of horse breeding since the Aragonese domination, whose cavalry drew from equine heritage of the island to strengthen their own army or to make a gift to the other sovereigns of Europe. Today the Island boasts the highest number of horse