The Maddalena Bridge owes its name to the sixteenth-century aedicule (no longer existent) on the left bank of the Serchio River in the vicinity of Borgo a Mozzano. Also known as Ponte del Diavolo (Devil’s bridge) for an old legend, it was probably built by order of Countess Mathilde of Canossa. With its peculiar "donkey back" structure and asymmetrical arches, it is a wonderful example of medieval engineering. It was later restored by Castruccio Castracani, condottiere and lord of Lucca in the early 14th century. In order to preserve its structure integral, in 1670 the General Council of the Republic of Lucca prohibited the transportation of millstones over it. A flood in 1836 caused serious damage to the structure, but the greatest alteration to the work occurred in the early 20th century when a new arch was made to enable the passage of the railway. The "donkey back" of this spectacular bridge can today be crossed on foot.