Trajan AE Sestertius, AD 116. IMP CAES NER TRAIANO OPTIMO AVG GER DAC PARTHICO P M TR P COS VI P P, laureate and draped bust right REX PARTHIS DATVS, Trajan seated left on platform, presenting Parthamaspates to kneeling Parthian Parthamaspates was a Parthian prince, the son of then-king Osroes, who had spent most of his life living in Rome in exile. When Trajan decided to invade Parthia to capitalize on the protracted civil war between Osroes and Vologases III, he brought Parthamaspates along to have a native who was sympathetic to Rome. Trajan succeeded in briefly dethroning Osroes when he captured Ctesiphon, and although he originally intended to subjugate the whole of Parthia, he decided it would be more prudent to install Parthamaspates on the throne, just as Augustus had done with Vonones a century prior. Almost immediately after the withdrawal of Trajan's troops, the forces of Osroes deposed Parthamaspates, who fled to Rome and was later installed by Hadrian as the client king of Osroene (Edessa) until his own death in 123. Let's see those related coins! Any more of the type floating out there?