Persis (also known as
Pars), a region in the southwestern
Iranian plateau, was the homeland of a southwestern branch of the
Iranian peoples, the
Persians. It was also the birthplace of the first Iranian Empire, the Achaemenids. The region served as the center of the empire until its conquest by the
Macedonian king
Alexander the Great (). Since the end of the 3rd or the beginning of the 2nd century BC, Persis was ruled by local dynasts subject to the
Hellenistic Seleucid Empire. These dynasts held the ancient Persian title of
frataraka ("leader, governor, forerunner"), which is also attested in the Achaemenid-era. Later the
frataraka Wadfradad II (fl. 138 BC) was made a vassal of the Iranian
Parthian (Arsacid) Empire. The
frataraka were shortly afterwards replaced by the Kings of Persis, most likely at the accession of the Arsacid monarch
Phraates II (). Unlike the
fratarakas, the Kings of Persis used the title of
shah ("king"), and laid foundations to a new dynasty, which may be labelled the Darayanids.
Sub-kings of the Parthian Empire According to Strabo, the early kings of Persis were tributaries to the Seleucid rulers, until c.140 BC, when the Parthians conquered the region: After his death, both Ardashir and Shapur started minted coins with the title of "king" and the portrait of Pabag. The obverse of Shapur's coins had the inscription "(His) Majesty, king Shapur" and the reverse had "son of (His) Majesty, king Pabag". Shapur's reign, however, proved short; he died under obscure conditions in 211/2. Ardashir thus succeeded Shapur as Ardashir V, and went on to conquer the rest of Iran, establishing the Sasanian Empire in 224 as Ardashir I. ==Coinage==