Parthia was an ancient region located in northeastern Iran, known for its significant role in the history of the Persian Empire. It was the heart of the Parthian Empire, which emerged around the 3rd century BCE and lasted until the 3rd century CE. The Parthians were known for their skilled cavalry and played a crucial role in the conflicts between the Roman Empire and the Persian Empire. The capital of Parthia was Ctesiphon, situated along the Tigris River. The Parthian Empire was notable for its cultural exchanges, blending Hellenistic and Persian influences. Its legacy includes advancements in trade, art, and governance, which impacted subsequent empires in the region.