AC Milan has won 29 major trophies, as well as other minor ones. It has won more international trophies than any other football club in the world; it has won the FIFA World Cup once and the Intercontinental cup three times. It also has 14 European trophies including 7 times winning the Champions' League. AC Milan has won the Italian national football championship 18 times and the Coppa Italia 5 times.
It is also one of the oldest teams, having been founded in 1899 (actually by one or more Englishmen). It was a premier league team from the start and has been so ever since. It has also stayed in its home region of Lombardy.
AC Milan is one of the richest football clubs in Europe and is owned by tycoon Silvia Berlusconi. You can find a full list of all the trophies they have won here.