Adur Gushnasp
Adur Gushnasp was the name of a Zoroastrian sacred fire of the highest grade, which served as one of the three most sacred fires of pre-Islamic Iran; the two others being the Adur Farnbag and Adur Burzen-Mihr. Out of the three, Adur Gushnasp is the only fire whose temple structure has been discovered and "for which archaeological, sigillographical, and textual evidence are all available."
History
Location and purpose
The temple, constructed by the Sasanian kings, was located in the city of Shiz in Adurbadagan, now present-day Takht-e Soleymān in the West Azerbaijan province. It served as a prominent site of pilgrimage. The identification of the site of Takht-e Soleyman with that of the fire temple of Adur Gushnasp became clear when a Sasanian era-bullae was discovered there, which had the following engraving "High-priest of the house of the fire of Gushnasp".Origin
The fire is not mentioned in early Sasanian sources, and archaeology suggests that the fire was first taken to the site in Adurbadagan in the late 4th or early 5th-century. Under the Sasanians, the fire was linked with the warrior class, which the Sasanian dynasty itself belonged to. In the same fashion as the Arsacids on Adur Burzen-Mihr, the Sasanian kings bestowed gifts on the temple of Adur Gushnasp, the first recorded king being Bahram V. The latter is mentioned in several instances related to the fire, such as celebrating Nowruz and Sadeh there, and also entrusting the high priest to convert his Indian wife. Khosrow I reportedly visited the fire before launching a military expedition.He also bestowed on the fire temple an extensive amount that was part of the tribute which the Byzantines paid the Sasanians. Kings were not the only ones who made offerings to the fire; according to the Saddar Bundahesh, it is recommended that when praying to reclaim eyesight to swear, "I shall make an eye of gold and send it to Adur Gushnasp" or, in order to make a child become astute and sensible, send a present to the fire. The fire temple of Adur Gushnasp was renowned for its immense amount of wealth in Byzantine and Islamic sources.