Definition: The Parthian Empire existed from about 247 B.C. A.D. 224, after revolting against the Seleucids. It is thought that the founder of the Parthian empire was Arsaces I of the tribe of the Parni. The Parthian Empire was located in modern Iran, from the Caspian Sea to the Tigris and Euphrates Valley. The Sasanians, under Ardashir I (who ruled from A.D. 224-241), defeated the Parthians, thereby putting an end to the Parthian Empire.


