Certainly! Here are six amazing facts about the Duomo di Milano (Milan Cathedral) and its tour:

1. Stunning Architecture: The Duomo di Milano is renowned for its magnificent Gothic architecture. It took nearly six centuries to complete, with construction starting in 1386 and finishing in 1965. The cathedral is adorned with intricate spires, statues, and flying buttresses, making it one of the most impressive examples of Gothic architecture in the world.

2. Impressive Size: This cathedral is one of the largest in the world. It covers an area of 109,641 square feet (10,186 square meters) and can hold up to 40,000 people. The vast interior is equally impressive, featuring five spacious naves with stunning stained glass windows.

3. Roof Access: One of the highlights of the Duomo Milan tour is the opportunity to access the cathedral's rooftop. Visitors can climb the narrow staircase or take an elevator to reach the rooftop, where they are rewarded with panoramic views of Milan. You can see the city skyline, the nearby Alps on a clear day, and get up close to the intricate spires and sculptures that adorn the roof.

4. Candoglia Marble: The stunning white marble used in the construction of the Duomo comes from the Candoglia quarries, located about 50 miles from Milan. This marble is known for its high quality and was transported to Milan using a network of canals and roads during the Middle Ages.

5. Gothic Art and Sculptures: Inside the Duomo, you'll find a wealth of Gothic art and sculptures. Notable pieces include the statue of St. Bartholomew flayed alive, a work by Marco d'Agrate, and the beautiful stained glass windows, some of which date back to the 15th century.

6. Sundials and Symbols: The Duomo is adorned with numerous sundials, astrological symbols, and other esoteric markings. These were used in medieval times for various purposes, including tracking time and celestial events. Some believe these symbols hold hidden meanings and secrets waiting to be deciphered.

Visiting the Duomo di Milano is a journey through history, art, and architecture, making it a must-see attraction for anyone exploring Milan.