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“Four illegal diggers were detained in this regard and surrendered to the judicial system for further investigation,” the police official noted. The Iron Age is an archaeological era, referring to a period in the prehistory and protohistory of the Old World (Afro-Eurasia) when the dominant toolmaking material was iron. Establishing a primary residence at Ctesiphon, on the Tigris River in southern Mesopotamia, Parthian kings ruled for nearly half a millennium and influenced politics from Asia Minor to northern India, until they were overthrown by Sasanian armies from southwest Iran in the early third century CE. Parthian wealth obtained through lucrative trade networks resulted in substantial patronage of the arts, in particular, relief sculpture, statuary (large and small scale), architectural sculpture, metalwork, jewelry, and ceramics.