During the tour, you will cross Sant'Angelo Bridge, a 1st-century archaeological wonder built by Emperor Hadrian. From there you can enjoy spectacular views of Castel Sant'Angelo. Although it was designed as a monumental pantheon for the family of Emperor Hadrian, it has been used as a castle and a prison. Do not forget to ask your guide about the origin of the castle’s name! It’s related to Pope Gregory I, a vision that he had while he was holding a procession, and a plague affecting Rome. During the tour, your guide will also share lots of information about the famous Vatican Museums, so you can visit them on your own.