Arianna finally finishes making panzanella [Tuscan bread salad], which she then enjoys eating while sitting outside under the Tuscan sun.

How could accounting books be so fascinating? The ones from the State Archives in Siena are veritable works of art and tell some interesting stories.

Arianna prepares the ingredients for the panzanella and stresses that this recipe is easily adaptable to personal tastes. You can't really go wrong. It's also a great recipe for anyone to make while vacationing in Italy, since it's so simple.

We have a look at two important medieval manuscripts in the State Archives. They are the original Constitution of the Republic of Siena. Alberto Angela gives us some fascinating facts concerning it that reaffirm how wise the rulers of that republic were.

Arianna, born and raised in Tuscany, will make panzanella, one of her favorite dishes. The main ingredient is quite humble: stale bread!

The Siena Cathedral is large, but it was supposed to have become much, much bigger. Alberto Angela tells the fascinating story.

Alberto Angela explores the Piccolomini Altarpiece with sculptures by Michelangelo, and the beautiful frescoed Piccolomini Library within the walls of the Siena Cathedral

Alberto Angela focuses on one of the floor inlays depicting the story of Siena according to tradition. Siena shares a city symbol with Rome.

The Siena Cathedral is one of the most notable examples of Italian Romanesque-Gothic cathedrals, and is well worth a visit, for both the beauty of the exterior and the unique marble artwork on the interior.

Alberto Angela brings medieval Siena to life, with the help of some breathtaking aerial shots.

After Philip's baptism, there is a banquet with typical Sicilian food, and favors for the guests. And there also happens to be a stunning view of Palermo from the convent or monastery hosting the party.

We are now in the heart of Italy: Tuscany. One of the most beautiful and important cities in Tuscany is Siena with its very particular piazza.

Alberto Angelo tells us the fascinating story of how trulli are built. Some of the most characteristic trulli can be found in Alberobello.

Antonino has a visitor from Sorrento on the Amalfi Coast, who brings in some of the world-famous Sorrento lemons. They prepare whole-wheat spaghetti with a simple sauce featuring lemon rind and bottarga (salted fish roe).

We visit the land of the trulli, curious dry stone huts. Alberto Angela gives us some background about these unique dwellings.