The triumph relief of Shapur, Sasanid king , in necropolis.
The relief explains how Shapur defeated two Roman empror.
In 244 A.D, the Roman legions invaded Mesopotamia and besieged the Sasanian capital Ctesiphon, but the war lasted long, and the Roman emperor Gordian III was replaced by Philippus Arabs, who was forced to conclude a peace treaty with Shapur. Philip even paid a ransom and was happy to return alive, allowing Shapur to present the events as if the new Roman ruler owed the throne to the Sasanian king.
The standing man, seized by the hand by Shapur, is the Roman emperor Valerian, who was taken captive in 260. The relief at Naqš-e Rustam,Necropolis, therefore, has to be dated after this event.