Milan is the second-most populous city in Italy, the first considering the metro area, and the capital of the Lombardy Region. The city proper has a population of 1.3 million, whilst the Milan metropolitan area has a population of over 4 million. The massive suburban sprawl that followed the post-war boom of the 1950s–60s and the growth of a vast commuter belt, suggest that socioeconomic linkages have expanded well beyond the boundaries of its administrative limits and its agglomeration, creating a metropolitan region of over 11 million people, stretching over the former provinces of Milan, Bergamo, Como, Lecco, Lodi, Monza and Brianza, Pavia, Varese and Novara.Milan was founded by the Insubres, a Celtic people. The city was later conquered by the Romans, becoming the capital of the Western Roman Empire. During the Middle Ages, Milan flourished as a commercial and banking center. In the course of centuries, it has been alternatively dominated by France, Habsburg Spain, and Austria, until when in 1859 the city was eventually annexed by the new Kingdom of Italy. During the early 1900s, Milan led the industrialization process of the young nation, being at the very center of the economic, social and political debate. Badly affected by the World War II devastations, and after a harsh Nazi occupation, the city became the main centre of the Italian Resistance. In post-war years, the city enjoyed a prolonged economic boom, attracting large flows of workers from Southern Italy. During the last decades, Milan has seen a dramatic rise in the number of international migrants, and today more than one sixth of its population is foreign born.Milan is the main industrial, commercial and financial centre of Italy and a leading global city. Its business district hosts the Borsa Italiana and the headquarters of the largest national banks and companies. The city is a major world fashion and design capital. Thanks to its important museums, theatres and landmarks Milan attracts over 6 million annual visitors. It hosts numerous cultural institutions and universities, with 185,000 enrolled students in 2011, i.e. 11 percent of the national total. The city is also well known for several international events and fairs, including Milan Fashion Week and the Milan Furniture Fair, the largest of its kind in the world, and will host the 2015 Universal Exposition. Milan is home to two of the world's major football teams, A.C. Milan and F.C. Internazionale Milano.