By: Mir M.Hosseini
The history of the Parthian kings are very obscure especially during this period but Ardoan I is mentioned as Shahanshah of the Arsacid dynasty in a report of lunar eclipse in April, 11, 80 B.C in Babylon. Although his rule that had started in 90 B.C. must have ended after ten years in 80 B.C. Part of his reign must have coincided with Mehrdad 2 the great who extended the borders of the Parthian empire to its limits.