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View of the remnants of the Royal Road that ran from Susa, in Persia (modern Iran) to Sardis – a distance of 1700 mi. [2725 km.]. This road was established by Darius I (520–486 B.C.) to link his capital Susa with the far western reaches of his empire. Horsemen carried messages (postal system) along this route.
For a map and a brief description of Sardis Click Here.
This image courtesy of Linda Kane.