The city has been recognized as one of the world's four fashion capitals thanks to several international events and fairs, including Milan Fashion Week and the Milan Furniture Fair, which are currently among the world's biggest in terms of revenue, visitors and growth. It hosted the Universal Exposition in 1906 and 2015. The city hosts numerous cultural institutions, academies and universities, with 11% of the national total enrolled students. Milan is the destination of 8 million overseas visitors every year, attracted by its museums and art galleries that boast some of the most important collections in the world, including major works by Leonardo da Vinci. The city is served by a large number of luxury hotels and is the fifth-most starred in the world by Michelin Guide. The city is home to two of Europe's most successful football teams, A.C. Milan and F.C. Internazionale, and one of Italy's main basketball teams, Olimpia Milano.
The etymology of the name Milan (Lombard: Milan[miˈlãː]) remains uncertain. One theory holds that the Latin name Mediolanum comes from the Latin words medio (in the middle) and planus (plain). However, some scholars believe that lanum comes from the Celtic root lan, meaning an enclosure or demarcated territory (source of the Welsh word llan, meaning "a sanctuary or church", ultimately cognate to English/GermanLand) in which Celtic communities used to build shrines. Hence Mediolanum could signify the central town or sanctuary of a Celtic tribe. Indeed, about sixty Gallo-Roman sites in France bore the name "Mediolanum", for example: Saintes (Mediolanum Santonum) and Évreux (Mediolanum Aulercorum). In addition, another theory links the name to the boar sow (the Scrofa semilanuta) an ancient emblem of the city, fancifully accounted for in Andrea Alciato's Emblemata (1584), beneath a woodcut of the first raising of the city walls, where a boar is seen lifted from the excavation, and the etymology of Mediolanum given as "half-wool", explained in Latin and in French.
The foundation of Milan is credited to two Celtic peoples, the Bituriges and the Aedui, having as their emblems a ram and a boar; therefore "The city's symbol is a wool-bearing boar, an animal of double form, here with sharp bristles, there with sleek wool." Alciato credits Ambrose for his account.