Looking at the city of Messina with mathematical eyes allows you to discover unsuspected similarities between different buildings and at the same time to learn in a simple way some element of mathematics that has fascinated young and old in centuries of Mediterranean history. The visited places will give an opportunity to tell stories of extraordinary mathematics, which have as protagonists various characters and also mathematically sagacious animals. At a later time, a Treasure Hunt will be organized, in which the participants will have to identify where certain mathematical details of the city are located.