Iran Currency

Iran currency was as Dinar ,it was currency of old Roma and Empire of East Roma too . this currency called Dinarous that was equal of a silver coin.After Arab attack this currency was selected as Dinar by Arab in all atority that they were .This Dinar still is using by Arabic countries after many years.As this process Iranian accept this currency as Iranian curecy.After many year and value of money goverments and people needs to change Iranian currency for …Dinar changed to equal coin..then Dinar changed to gheran and then to toman during of years….and different king dynesties ..toamn means one ten thusand  of Gheran and Gheran was one thusand of Dinar,this days afficial Iranian currency is Toamn 10 time of rial that has changed not more than a 30days from Rial that was official for many years ago.