What was the 'sacred book'?
What were 'magi'?
What was the 'Holy Arta', and what did it emphasise?
What did Xerxes attribute to Ahura Mazda?
What was Xerxes an "adversary" of, and what evidence is there to prove it?
Which historian describes Xerxes' devotion to Ahura Mazda, and what do they say about it?
What evidence is there of foreign cults in Persepolis, and when was it discovered?
What was Xerxes' attitude towards other religions?