Parsis are a religious community that follow the religion of Zoroastrianism, which revolves around the worship of fire and the elements of nature. They fled from Persia (modern day Iran) to avoid religious persecution and landed in India and were granted refuge by the local rulers. Today, Most of the Parsi population in India is settled in Mumbai and parts of Gujarat.
Parsis are known to have strict rules with regards to practice, worship and interactions with people outside the community. Examples of this include not allowing conversions to Zoroastrianism, not allowing people to marry outside the community, and outcasting those who do, not allowing people from outside the community to enter residential complexes and temples.
Over the years, their numbers have been dwindling, having only approx. 60,000 people in their community currently, which is projected to drop below 20,000 by the year 2050.