Adur Gushnasp

Adur Gushnasp (Middle Persian: 𐭠𐭲𐭥𐭫𐭩 𐭦𐭩 𐭢𐭱𐭭𐭮𐭯 ʾtwly ZY gšnsp Ādur ī Gušnasp; New Persian: آذرگشسب Āzargušasb) 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 whose temple structure has been discovered and "for which archaeological, sigillographical, and textual evidence are all available."