During our journey on Octavian's trail , we find the bridge initiated by Augustus in 14 AD and terminated in 21 AD by his successor Tiberius, as we are reminded by the inscription on the inside parapets. The bridge was constructed using Istrian stone, and is more than 70 m long and stretches over 5 archways resting on sturdy piers with breakwaler spurs, all oblique compared to the street direction in to combat the strength of the current, following its flow.
The bridge is a starting point for via Aemilia and via Popillia. It is an imposing structure, thanks to its engineering and architectural design which unites its practical, functional role with the harmony of the forms used to exalt the emperors. Such exaltation can be seen in the inscription and in the sober decorative elements which emphasise the emperor's civil power (the laurel wreath and the shield) and religious power (the lituus, or priest’ s wand, the jug and the patera for carrying out sacrifices).
Recent inspections have shown that the piers rest on a system of wooden piles that is still in efficient working order.
Over the centuries the bridge has endured many episodes that threatened its survival, from earthquakes to floods, and from wear and erosion to battles, like the attack made on it by Narses in 551 during the war between the Byzantines and the Ostrogoths.