This is a beautiful Gothic-style building which was begun in the fifteenth century, making it one of the oldest town halls in the country. Here you can see the Palace of Justice and the Basilica, as well as the town hall. You can access the latter for a few euros, and can admire its interior, with large nineteenth century tapestries, decorative objects, and a huge vault. The audio guide will help you enjoy some interesting facts about the history of the city. I also recommend visiting the church, which houses some fascinating relics.