After the 1548 flood of the Sieve destroyed the old bridge, in 1555 Cosimo I commissioned Stefano di San Piero a Ponti and his son Tommaso to build a new bridge, which was probably erected on a plan by Bartolomeo Ammannati. It was restored in 1788 by order of Grand Duke Peter Leopold of Lorraine when he opened the royal roads of Casentino and San Godenzo, and then again around 1950 to repair the damage caused by World War II.

Its structure consists of two brick arches that rest on a central robust abutment in pietra forte. It connects the old village of Pontassieve and the hamlet of San Francesco in the Commune of Pelago.