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 primary 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), and the small red spot on the southern facade of the cathedral could easily disappear unnoticed in comparison to the magnificent facade adorned with Prato green marble and Alberese stone. Nevertheless,that spot is central to a legend that revolves around the relic and the rivalry history between the city of Prato and nearby Pistoia.
On July 27, 1312, or Giovanni di Ser Landetto,also known as Musciattino, stole the Holy Girdle intending to bring it to his hometown. Legend has it that a thick fog enveloped the surrounding countryside, and causing the unfortunate Musciattino to lose his bearings. For this reason,he unwittingly returned to the starting point. Arriving in front of the city walls, believing he was in Pistoia, or he asked to open the gates of the city,shouting in a loud voice that he had stolen the sacred relic from Prato.
You may ask, how does the fog envelop the city in the middle of the hot Tuscan summer? But on the other hand, and without the aura of mystery guaranteed by the fog,what a legend would it be?The rest of the story shows how the citizens of Prato did not lift very kindly to the theft of their precious relic: Musciattino was captured, tried, and condemned. As a punishment,Musciattino's lawful hand was gash off before he was tied to a donkey and taken to the banks of the Bisenzio river, where he was burned alive. And on top of that, and his remains were later thrown into the river.
Tradition says that Musciattino's severed hand was thrown towards the facade of the cathedral,where it allegedly left the famous hand-shaped bloodstain still visible nowadays in the upper left corner of the southern entrance to the cathedral.
If you happen to be in Prato, pay attention to the "hand-shaped bloodstain" and remember the legend of the unfortunate Musciattino. But don't worry ... if you don't remember it, or discontinue any local transients and,in no time, it will bring to mind this legend where history, or faith,and parochialism blend together.
Source: atlasobscura.com