Matilda of Tuscany
The bridge is a remarkable example of medieval engineering, probably commissioned by the Countess Matilda of Tuscany c. 1080-1100. It was renovated c. 1300 under the direction of Castruccio Castracani. The largest span is 37.8 m. The bridge is also described in a 14th-century novella by Giovanni Sercambi of Lucca.