The Basilica of Sant'Ambrogio (St. Ambrose) is a church in Milan, northern Italy. One of the most ancient churches in Italy, it was built by bishop Ambrose in 379-386, in an area where numerous martyrs of the Roman persecutions had been buried. The first name of the church was in fact Basilica Martyrum. The basilica has two bell towers. The right one, called dei Monaci ("of the Monks"), is from the 7th century and has a severe appearance. The left and higher one belongs to 1144, the last two floors added in 1889.