Hatra
Hatra was an ancient fortified city in northern Mesopotamia, serving as the capital of the first Arab kingdom under Parthian influence and acting as a buffer state between the Roman Empire and the Parthian Empire during the 2nd and early 3rd centuries AD.[1][2] Located approximately 110 kilometers southwest of modern Mosul in Iraq's Nineveh Governorate, the city featured a distinctive circular layout with massive double walls— an outer earthen bank spanning 9 kilometers and an inner stone wall of 2 kilometers reinforced by 171 towers—enabling it to withstand sieges by Roman emperors Trajan in 116–117 AD and Septimius Severus in 197–198 AD.[1][2] As a vital caravan trade hub and religious center, Hatra hosted temples dedicated to deities such as Shamash, Nergal, and Atargatis, blending Hellenistic, Roman, Mesopotamian, and Arabian architectural and artistic elements in structures like the Great Temple with its expansive iwans.[2][1] The kingdom's independence ended in 241 AD when it was sacked and destroyed by the Sasanian king Shapur I, leading to its abandonment until rediscovery in the 19th century; designated a UNESCO World Heritage Site in 1985, the ruins have faced further damage from conflict, including looting by ISIS militants in 2015.[2][3][1]