The Persian Empire
Zoroastrianism was the dominant religion practiced in the Persian Empire. It was founded by the prophet Zoroaster and emphasized concepts of duality between good and evil, free will, and the worship of one supreme deity, Ahura Mazda.
Zoroastrianism was Persia's official religion. The Avesta is the holy book of the adherents of Zarathustra, the Zoroastrians, the supreme god Ahuramazda. King Darius says: Ahuramazda has granted unto me this empire. Ahuramazda brought me help, until I gained this empire; by the grace of Ahuramazda do I hold this empire. The ancient Persian religion was called Zoroastrianism. The religion has adherents to this day. Currently, the main Persian religion is Islam.
The Persian Empire introduced the religion of Zoroastrianism, founded by the prophet Zoroaster (who is also known as Zarathustra). The religion of Zoroastrianism has been almost completely extinguished in Persia (which is now Iran) by Islam, however it does survive in India, where immigrants from Persia are known as Parsis, and the religion has become known as Parsi.
Zoroastrianism is religion
Zoroastrianism is a monotheistic religion, whereas the Vedic religion is polytheistic.
Also called Mazdaism and Magianism, is an ancient Iranian religion and a religious philosophy. It was once the state of Achaemid Empire and Sassanid Empire.
Zoroastrianism.
The Persian Empire had many religious practices, and the rulers made no attempt to change this. The cult used by the Persian upper class was Zoroastrianism - a religion codified by Zoroaster (Zarathustra) with a high god Ahura Mazda (Great Light).
Prior to the conversion to Islam, the predominant religion of Persia was Zoroastrianism.
The Persians were very tolerant and did not interfere in the varieties of polytheism which existed. The imperial cult of Zoroastrianism remained just that.
Zoroastrianism
Zoroastrianism or Mazdaism.