restored faith orthodox form hellenistic arsacids allowed zoroastrianism become corrupt among migrations cities margins great salt deserts particular yazd kerman remain centers iranian zoroastrianism day yazd became seat iranian high priests mongol il khanate rule best hope survival non muslim inconspicuous ref name boyce ref crucial present day survival zoroastrianism migration northeastern iranian town sanjan south western khorasan ref name boyce ref gujarat western
Humanities Theology Zoroastrianism