I've just told you about the medieval town of Cava dei Tirreni in province of Salerno not too far from Naples. The central and the most antique part of it, Borgo, has very interesting look, storically created by the mercants and their shops with the porticos.
The town organizes different medieval manifestations during the year and the most believed is the "Challenge of the Tromboners" that had just the 37 edition. Here is one of part of the feast that I liked more than others. Hope, they won the contest the day after I coud not visit.