Some sources       I arrived here on a search for more background while reading History of the Persian Empire AT Olmstead University of Chicago Press   p  in a chapter describing the new capital city of the new Persian Empire   along which he Cyrus the Great had watched the defeated Medes streaming back to Ecbatana  Olmstead cites Strabo the ancient greek geographer xv     Olmstead devotes chapter  to The three capitals Ebbatana Babylon and Susa  Im no scholar and cant weigh in on this discussion beyond suggesting these sources   john tucker dec