Explore faith through culture and art in the magnificent complex of the Cathedral of Siena. With a pass you can choose what you'd like to see most, from the crypt to the Opera Museum.See all of the Cathedral of Siena, including the Piccolomini Library, the Opera Museum, and the Baptistery. Other highlights include the Crypt, which contains some of the most important artworks in the whole complex, including bright paintings only discovered after recent renovations. The vibrant frescoes of the Piccolomini Library were done by Pinturicchio, likely based on designs by Raphael.