nations acknowledged usurper especially granted remission taxes three years ref name perseustuftsedu darius later achaemenid emperors acknowledged devotion ahura mazda inscriptions attested several times behistun inscription appear continued model coexistence religions whether darius follower teachings zoroaster conclusively established indication note worship ahura mazda exclusively zoroastrian practice according later zoroastrian legend ''denkard'' ''book arda viraf'' many sacred
Humanities Theology Zoroastrianism