Arsacid Dynasty

Also called  Arshakuni  (247 BC–AD 224), ancient Iranian dynasty that founded and ruled the Parthian empire. The progenitors of the dynasty were members of the Parni tribe living east of the Caspian Sea. They entered Parthia (q.v.) shortly after the death of Alexander the Great (323 BC) and gradually gained control over much of Iran and Mesopotamia until, in AD 224, they were overthrown by the Sasanians, an Iranian dynasty founded