Dura-Europos , also spelled Dura-Europus, was a Hellenistic, Parthian and Roman border city built on an escarpment 90 m above the right bank of the Euphrates river. It is located near the village of Salhiyé, in today's Syria. It was conquered in 114 AD and finally captured in 165 AD by the Romans (who greatly enlarged it as their easternmost stronghold in Mesopotamia) and destroyed after a Sassanian siege in 257 AD. After it was abandoned, it was covered by sand and mud and disappeared from sight.