From Wikipedia, the free encyclopedia: / Persian Immortals, detail from the archers’ frieze in Darius’ palace in Susa. Silicious glazed bricks, c. 510 BC. The “Immortals” (from the Greek Ἀθάνατοι, sometimes “Ten Thousand Immortals” or “Persian Immortals… • Millions of unique designs by independent artists. Find your thing.
The government of ancient Persia was based on a highly efficient bureaucracy which combined the concepts of the centralization of power with the decentralization of administration. The Achaemenid Empire (c. 550-330 BCE) founded by Cyrus the Great (r. c. 550-530 BCE) is sometimes claimed to have invented this form of government but, actually, Cyrus drew on earlier models of Akkadian and Assyrian administration and greatly improved them.