Teppe Hasanlu or Hasanlu Tepe is an archeological site of an ancient city located in northwest Iran, a short distance south of Lake Urmia. The nature of its destruction at the end of the 9th century BC essentially froze one layer of the city in time, providing researchers with extremely well preserved buildings, artifacts, and skeletal remains from the victims and enemy combatants of the attack. The site was likely associated with the Mannaeans.

West Azerbaijan province is one of the 31 provinces of Iran, whose capital and largest city is Urmia. It is in the northwest of the country, bordered by Turkey, Iraq and Azerbaijan's Nakhchivan Autonomous Republic, as well as the provinces of East Azerbaijan, Zanjan and Kurdistan. The Iranian province is part of Region 3. It is separated from Armenia by Turkey's short border with the Azerbaijan Republic.