Saint Stephen’s Cathedral is the primary Catholic place of worship of Prato, a manufacturing city not far from Florence that is known for its wool industry. The cathedral is mainly known for being the place where one of the most important Marian relics is guarded: the Holy Girdle (Sacro Cingolo in Italian). According to Catholic tradition, this simple belt belonged to the Virgin Mary and was given to Saint Thomas during her assumption into Heaven. While walking through Cathedral Square (Piazza del Duomo), the small red spot on the southern…