what was the name of ruler that converts to zoroastrianism and spreads the religion?
Zoroaster ( also known as Zarathustra ) was an important religious figure in ancient Persia ( present-day Iran and surrounding areas ) , whose teachings became the foundation of a religious movement named Zoroastrianism , a tradition that would largely dominate Persia until the mid-7th century CE , when Islam gained ascendancy in the region after ...