Milan dates back to 400BC.  Today Milan is the 2nd largest metropolitan city in Italy. The population of the city proper is 1.3 million, while its urban area with a population estimated to be about 5.5 million  is the 5th-largest in the EU. Milan is the main industrial and financial centre of Italy, it has the 3rd-largest economy among EU cities after London and Paris, and the largest among European non-capital cities.  The da Vinci’s Last Supper is in Milan, you need reservations to see it 4 to 5 months in advance and if you want to get in with a guided tour for 15 min it is €50 per person.  It is a busy city with a number of great buildings and a recent site of the EXPO.