Takht-e Soleyman

Takht-e Soleymān or Adur Gushnasp, is an archaeological site in West Azerbaijan, Iran dating back to Sasanian Empire. It lies midway between Urmia and Hamadan, very near the present-day town of Takab, and 400 km west of Tehran.

The fortified site, which is located on a hill created by the outflow of a calcium-rich spring pond, was recognized as a World Heritage Site in July 2003. The citadel includes the remains of Adur Gushnasp, a Zoroastrian fire temple built during the Sassanid period and partially rebuilt during the Ilkhanid period. This temple housed one of the three "Great Fires" or "Royal Fires" that Sassanid rulers humbled themselves before in order to ascend the throne.