Milan, Italy

Milan Cathedral is a elaborate and spiky Gothic edifice on the main square in the city center. It is the second largest Catholic cathedral in the world. And you can walk on the roof!

Founded in 876, this church was dedicated to St. Satyrus, brother of St. Ambrose, and stands on the reputed site of his house. It was later remodeled by Bramante.

This ancient basilica was consecrated by St. Ambrose in 387 and rebuilt in the 11th century. It became the model for all Lombard Romanesque churches.

Beneath Milan's Duomo lie the ruins of older cathedrals and a 4th-century baptistery, where St. Ambrose, Bishop of Milan, baptized St. Augustine.

Located in the Duomo's crypt, Milan's treasury displays a magnificent collection of Early Christian and Romanesque artworks, including ivory book covers with biblical scenes, reliquaries, and vestments.

The former Dominican monastery church of Santa Maria delle Grazie in Milan is home to Leonardo da Vinci's Last Supper, one of the most famous paintings in the world.

Dating from the 4th century, when Milan was the capital of the western Roman Empire, this is the oldest church in the city. Sixteen ancient Roman columns line the front of the church.