What seems certain is that the city was founded on the site of an old Carian town, Idrias, anciently called Chrysaoris, said to be the first town funded by the Lycians. Later it passed under the control of the Achaemenid Empire. According to Athens' tribute "assessment" of 425 BC Idrias was supposed to be responsible for the payment of the considerable sum of six talents. Like many other non-Greek cities on the 425 BC assessment Idrias is never recorded actually paying any tribute to Athens and was never a member of the Delian League. In early Seleucid times, Stratonikeia was a member of the Chrysaorian League, a confederation of Carian towns. The Stratonikeians, though not of Carian origin, were admitted into the confederacy, because they possessed certain small towns or villages, which formed part of it. The league is attested by an inscription already in 267 BC, but was probably older still. Near the town was the temple of Zeus Chrysaoreus, at which the League's assembly met; at these meetings several city-states had votes in proportion to the number of towns they possessed.