Meet your guide at the entrance of the castle and embark on a historical journey starting in the 3rd Century A.D., when the castle was built as a  Mausoleum for Emperor Hadrian. Through stories and fun facts, learn how the castle later became a fortress in the Middle Ages and was then turned into a prison, offices of the Vatican Treasury and Archive, and finally into the residence of the Popes during the Renaissance. Discover the stories of Alexander the Great in the Hall of Paolina and uncover the myth of the Greek hero, Persus, in the Hall of Persus. Admire the collection of ancient arms, marbles, ceramics, and sculptures and stroll through the painting gallery with works by Carlo Crivelli, Luca Signorelli, and Dosso Dossifrom.  Learn about the famous Passetto, the hidden path used by the Popes to escape the castle when the Vatican was under attack, and visit the apartment of Pope Paul III. Take in views of the historical center from the castle's terrace and learn about the castle's role in famous movies.  At the end of the tour, you will have the option of staying in the castle to continue exploring at your own pace.