An ancient city between the Tigris and Euphrates rivers in northern Iraq, founded as a military outpost by the Arsacids (Parthians) during the 1st century BC. It soon became the center of the small state of Araba and an important caravan city. Temples were built for the Sumero-Akkadian god Nergal, to Hermes (Greek), to Atargatis (Aramean), to al-Lat and Shamiya (Arabian), and to Shamash, a sun god. Hatra defied many Roman invasions. It was destroyed by Sassanians c 241 AD. Ruins include town walls gates, a large palace, houses and tombs, with striking stone statues and reliefs, and Aramaic inscriptions.