Adur Gushnasp was the name of a Zoroastrian sacred fire of the highest grade (Atash Behram), 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 that has been discovered and "for which archaeological, sigillographical, and textual evidence are all available." It was based at modern-day Takht-e Soleyman in the West Azerbaijan Province and established in a temple structure constructed under the Sasanian kings. It served as a prominent site of pilgrimage.
The fire temple was pillaged during the late stages of the Byzantine–Sasanian War of 602–628.
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