I got 4 nights to spend in Milan! Help me enjoy my stay!

I guess that my bad luck with flights finally paid of! I got 4 nights to spend in Milan! Help me enjoy my stay! Since I waited for almost 6 hours at the airport for my luggage, the agency I travel with offered me to stay overnight in Milan at their expenses. What can I say, I decided to be greedy and now I will have a mini vacation in Italy!

First of all, Milan, or Milano is an economic heart of Italy, with its stock market and many business centers. Since it is a rival to Paris in terms of fashion, you can find a lot of latest clothes design both in shops and in the street. As for culture, you will have to see Duomo, an impressive gothic cathedral. One other thing that you must see is Leonardos Last Supper, located in the Church and Convent of Santa Maria delle Graziea