Answer:
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 the fall of the Sasanian Empire, the last pre-Islamic Persian empire.