To Croesus, King of Lydia, on being shown his golden treasures, Solon said: “If another comes who hath better iron than you, he will take away your gold.”
*image shown depicts King Croesus, unlikely to show Solon.
King Croesus introduces gold coinage (adopted by the Persians after they defeated him) although his coins used a gold-silver alloy (electrum) based on the composition of the alluvial deposits. When he asked the Delphic oracle of Amphiarus if he should wage a campaign against Cyrus the Great of Persia or seek an alliance, the Delphic advice was that if Croesus attacked the Persians, he would destroy a great empire.
Herodotus, The History of Herodotus, Translated by George Rawlinson