A bridge built over centuries
Why the middle floats
Construction began in 1171 with a pontoon crossing. Stone sections extended gradually from the banks, while the central channel retained floating boats. By the sixteenth century, the bridge had developed the arrangement associated with its 24 piers and 18-boat pontoon. The structure seen today includes later repairs and reconstruction.
Stand on the bank first and find the change from fixed masonry to the lower floating section. The middle can be separated for navigation, so this is both a pedestrian crossing and a response to a working river. Pontoons being disconnected is different from the entire bridge being dismantled.

