Osroes I of Parthia

Osroes I was a Parthian contender, who ruled the western portion of the Parthian Empire from 109 to 129, with one-year interruption. For the whole of his reign he contended with the rival king Vologases III based in the eastern parts. In 116, Osroes I was briefly ousted from his throne at Ctesiphon during a invasion by Roman emperor Trajan, who installed his son Parthamaspates. After Trajans death the following year, Osroes I's rule was reinstated by the Parthian nobility. In 129, he was removed from power by Vologases III.