ancient land of western Anatolia, extending east from the Aegean Sea and occupying the valleys of the Hermus and Cayster rivers. The Lydians were said to be the originators of gold and silver coins (coin). During their brief hegemony over Asia Minor from the middle of the 7th to the middle of the 6th century BC, the Lydians profoundly influenced the Ionian Greeks to their west.

In the 7th century BC Lydia filled the vacuum left by the Cimmerian destruction of Phrygia and established a dynasty at Sardis under the legendary king Gyges. The kingdom reached its zenith under Alyattes (c. 619–560), who parried a Median threat, pushed back the Cimmerians (Cimmerian), and extended his rule in Ionia. The kingdom seemed destined to reach even greater heights under Alyattes' son, the wealthy Croesus, when the Persians under Cyrus brought the Lydian monarchy to a final and dramatic end (c. 546–540).

The Lydians were a commercial people, who, according to Herodotus, had customs like the Greeks and were the first people to establish permanent retail shops. Their invention of metallic coinage, which the Greeks quickly adopted, played an important part as a catalyst in the commercial revolution that transformed Greek civilization in the 6th century BC.