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An Atash Behram (Fire of Victory) is the highest grade of fire that can be placed in a Zoroastrian fire temple as an eternal flame. The other two lower graded fires are Atash Adaran and below Adaran is the Atash Dadgah; these three grades signify the degree of reverence and dignity these are held in. The establishment and consecration of the Atash Behram fire is the most elaborate of all the grades of fire. It involves the gathering of 16 different types of fire, including fire by lightning (i.e. gathering up any branch of tree ignited by a lightning strike), fire from a cremation pyre, fire from trades where a furnace is operated, and fires from the hearths, as is also the case for the Atash Adaran. Each of the 16 fires is then subject to a purification ritual before it joins the others. A large team of priests is required for the purification and consecration ceremonies, which can take up to a year to complete.
The religious significance of gathering purifying and consecrating several fires is to purify and return to Ahura Mazda his first pure creation in its pristine form, to become a focus of worship and His eternal pure symbol, never allowed to go out. The sacred fire at Udvada Atash Behram, for example, kindled in 721 CE in Sanjan, burns continually to this day, now in Udvada since 1741, and housed in a magnificent Persian style temple building since 1742.