A small room in the Duomo that houses a wonderful collection of illustrated sheet music. Also the walls are covered with incredible frescoes that are extremely well preserved.

Definitely worth visiting the cathedral, even if just to see this incredible room. The frescos are stunning, but don't forget to look at the medieval manuscripts too -- they're in superb condition, and beautifully decorated!

Unbelievable color and history! From the 1500's and have never been retouched. The walls are adorned with artwork panels of the life of Piccolomini.

See my post on the Siena Cathedral. The biblioteca is inside the main structure of the Siena Cathedral. Again, the 12 euro all access ticket allows entry into this attraction. this is definitely another site worth seeing. NO FLASH PHOTOGRAPHY ALLOWED!

This is Stunning! The colours used on the Fresco's seem to be alive and it feels like it has just been painted. This is the best presented 'room' I have seen so far in Italy, and I've seen quite a few. Take the opportunity to sit around the edges and look at the detail. NOT TO BE MISSED Just be... More

We had finished looking at the cathedral, been impressed by the Bernini and Donatello works and finally figured out which sculpture was the real Michelangelo when my wife asked if wanted to "go into the library--apparently it's part of the tour." Wow, am I glad we decided to go in! The colors are amazingly fresh. Really worth the visit, especially... More

This seems recently restored, and it looks like a box of jewels! Frescoes and ornamentation cover the upper walls and ceilings. Along the walls, below the frescoes and behind glass, are large illuminated manuscripts from the fifteenth century. This is a small room off the main Siena cathedral, but well worth the extra minutes. Don't miss it!

It is hard to believe the frescoes in here are hundreds of years old, they are so colorful and bright... it was fun to study the walls from the other side and discover pieces of gold attached to decorate capes, buckles and swords. True masterpieces! It is useful to take visit with a guide (ask at the desk once you're... More

I visited Siena with family in April. While in the Siena Cathedral, the Piccolomini Library is a must-see! It was quite crowded while we were there but you could take photos. Just beautiful!