Hunchback Bridge or Devil's Bridge
In the Middle Ages, the construction of a bridge was considered a miraculous feat. For this reason, the construction of such structures gave rise to many legends, often involving the devil: joining two places that God had wanted separated was seen by many as a "diabolical" work.
According to an ancient legend, Saint Columbanus, a 7th-century Irish monk, was eager to bring the word of God to the people living on the other bank of the Trebbia River, near the town of Bobbio. The devil promised to build the bridge in a single night, in exchange for the first mortal soul to cross it. The saint accepted. That night, the devil summoned several little devils who assisted him in the construction work, holding up the bridge's arches. The demons were of different heights, and thus the various arches of the bridge were of varying sizes.
In the morning, the devil stationed himself at the end of the bridge to demand his payment. But Saint Columbanus outwitted him by having his poor, suffering and very sick dog (some say it was a bear) cross the bridge instead of a man. The enraged devil returned to hell, but not before kicking his handiwork, which has been crooked ever since. It is said that the footprints of the unfortunate animal that served as a guinea pig still remain in the crypt of the Church of Saint Columbanus.
The Hunchback Bridge, also known as the Ponte Vecchio or, more precisely, the Devil's Bridge, is a Roman structure that has undergone numerous renovations over the centuries. The structure above dates back to the 7th century, but traces of an older bridge, dating back to before Columbanus' arrival, have been found underneath. The bridge, characterized by its undulating shape, irregular arches, and relatively narrow carriageway, is 280 meters long and connects the two banks of the river through a complicated succession of 11 irregular spans, varying in span and height, creating an undulating path from one end to the other. The Bobbio Bridge, now used only as a pedestrian crossing, is the very symbol of the city of San Colombano, as well as one of the strangest and most original architectural structures in Italy.
Source: Emilia-Romagna Region