The Quiz: What was the state religion of the Persian Empire?
Islam
Zoroastrianism
Baháʼí
Jainism
Cyrus the Great was a devout Zoroastrian. Upon the foundation of his empire, Zoroastrianism was made the state religion, though by most accounts, adhering to the Zoroastrian faith was not a requirement in the empire. Zoroastrians believe in a supreme being called Ahura Mazda, who may have been the first monotheistic god in history.
The correct answer to this quiz is Zoroastrianism.