It is a religion and philosophy based on the teachings of prophet Zoroaster or Zarathustra and was formerly among the world's largest religions, probably founded some time before the 6th century BC in Greater Iran.
Zoroastrianism is based on the teachings of Zoroaster, a 6th century Iranian prophet and philosopher. Zoroastrianism is almost identical with Mazdaism (the worship of Ahura Mazda, the supreme deity exalted by Zoroaster). Zoroastrianism survives today in isolated areas of the Middle East, primarily Iran, but more prosperously in India, where the descendants of Zoroastrian Persian immigrants are known as Parsis, or Parsees. In India the religion is called Parsiism. As with all false religions, Zoroastrianism is incompatible with Christianity. (cont is comments)
Since the question is already answered, I have two things. One: put some clothes on. Modesty is appreciated. While I don't mind people doing stupid stuff like that, there are people on this site who aren't as immune to being offended. My second comment is for strawberrygirl. Stop calling other religions false religions. Ever heard the saying "if you have nothing nice to say, don't say anything"? It's called respect. Don't go trampling on religions just because you want to. It's rude, childish, and you wouldn't like it if someone said that to you. Remember the Golden Rule "Treat others how you want to be treated"? I think you need to keep that in mind when making those comments about other religions.