Babylon

Babylon was a city-state of ancient Mesopotamia, founded around 2300 BC, the remains of which are found in present-day Al Hillah, Babil Province, Iraq, about 85 kilometers (55 mi) south of Baghdad. All that remains of the original ancient famed city of Babylon today is a mound, or tell, of broken mud-brick buildings and debris in the fertile Mesopotamian plain between the Tigris and Euphrates rivers, in Iraq. In 539 BC, it fell to the Persians and became their capital.

Babylon in "Counting Potsherds"
Mithredath searched out all documents in Babylon related to the conquest of Greece by Khsrish I. They proved insufficient to properly honor him so Mithredath set off to Greece to find more information.