The Band-e Kaisar of Bridge of Valerian was a Roman stone arch bridge built in what is now Shushtar, Iran. At the time it was built, around 260 – 270 CE, the bridge was combined with a dam – making Band-e Kaisar the first of its kind in the country. The bridge/dam was the most eastern Roman bridge/dam, lying deep in Persian territory.
According to Persian history, Band-e Kaisar was named after the Roman Emperor Valerian, who was captured with his entire army by the Sassanid ruler Shapur I. The dam bridge was used until the late 19th century and today Band-e Kaisar is part of a larger UNESCO World Heritage Site in the area.