Croesus stater: The 2,500-year-old coin that introduced the gold standard

A small gold coin on a black background. The front has a lion and bull; the back has two squares. — Example of a gold croeseid from the 6th century B.C., with images of a lion and a bull on the front.

(Image credit: Alamy)

Name: Croesus stater or Croeseid

What it is: A gold coin

Croesus ruled over the kingdom of Lydia, the western half of what is now Turkey, from 560 to 546 B.C. Already a wealthy man thanks to his control over the precious metal deposits in the Pactolus River (now known as the Sart Çayı), Croesus expanded his power by establishing diplomatic ties and trade relationships with Egypt, Greece and Babylon. This trade was facilitated through the invention of coins — small, circular bits of precious metal — which were first issued by Croesus' father, Alyattes, around 650 B.C.

Croesus decided to change the variable electrum coins into two separate denominations to eliminate the guesswork on valuation. He set up workshops in Sardis, the capital of Lydia, to refine gold and silver from electrum. These first coins were about the size of a dime and were standardized at 10.7 grams (about one-third of an ounce). There was a consistent exchange rate between gold and silver, making Croesus' system the world's first two-metal monetary system and the earliest gold standard.

The gold and silver Croeseids had the same design. On one side were the front parts of a lion and a bull. The symbolism may reflect a common Near Eastern motif, or each animal may represent one of the precious metals. On the back of the coin, two squares were hammered into the gold staters and one into the silver ones. Soon after Croesus invented modern coinage, the idea was adopted throughout the ancient world.

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Kristina Killgrove is a staff writer at Live Science with a focus on archaeology and paleoanthropology news. Her articles have also appeared in venues such as Forbes, Smithsonian, and Mental Floss. Kristina holds a Ph.D. in biological anthropology and an M.A. in classical archaeology from the University of North Carolina, as well as a B.A. in Latin from the University of Virginia, and she was formerly a university professor and researcher. She has received awards from the Society for American Archaeology and the American Anthropological Association for her science writing.