In a Middle Persian text known as "Khusro and the Page," one of the most famous kings of the ancient Iranian world, Khusro I Anusheruwan, is called haft kiswar xawadāy "the King of the Seven Climes." This title harkens back to at least the Achaemenid period when it was in fact used, and even further back to a Zoroastrian/Avestan world view. From the earliest Iranian hymns, those of the Gāthās of Zarathushtra, through the Younger...