Milan Duomo, Cathedral Interior, Italy
This Gothic masterpiece was started in the 14th century and nearly 600 years later completed. It is the most important buiding in Milan (Milano), Italy. The marble exterior is covered in statues of saints and biblical stories.
Masses are held daily and free to the public. Watching one feels like stepping into a portal of time with its medival tapesty , tombs of saints, and dazzling stain glass windows. I also suggest you visit the rooftop for a closeup of the spires, arches, and views of the distant Alps. It's almost as large as Saint Peter's in Rome but without the huge crowds.