Arsaces I was the first king of Parthia, ruling from 247 BC to 217 BC, as well as the founder and eponym of the Arsacid dynasty of Parthia. The leader of the Parni, one of the three tribes of the Daha
Coin of Arsaces I. The reverse shows a seated archer carrying a bow, with the Greek legend reading "ΑΡΣΑΚΟΥ" (right) and "[AYT]OKPATOP[OΣ]" (left), meaning [coin of] "Arsaces autocrator".