Bari is the capital city of the Metropolitan City of Bari and of the Apulia region, on the Adriatic Sea, in southern Italy. It is the second most important economic centre of mainland Southern Italy after Naples, a port and university city, as well as the city of Saint Nicholas. The city itself has a population of 320,257 inhabitants, over 116 square kilometres (45 sq mi), while the urban area has 750,000 inhabitants. The metropolitan area has 1.3 million inhabitants.