A fire temple in Zoroastrianism is the place of worship for Zoroastrians, often called dar-e mehr (Persian) or agiyari (Gujarati). In the Zoroastrian religion, fire (see Atar), together with clean water (see Aban), are agents of ritual purity. Clean, white “ash for the purification ceremonies [is] regarded as the basis of ritual life”, which “are essentially the rites proper to the tending of a domestic fire, for the temple [fire] is that of the hearth fire raised to a new solemnity”.
For, one “who sacrifices unto fire with fuel in his hand …, is given happiness”.
As of 2010, there were 50 fire temples in Mumbai, 100 in the rest of India, and 27 in the rest of the world.