Tetradrachm

Kyrene's wealth derived almost entirely from silphium, the now-extinct plant so commercially vital that it appeared on the city's coinage and was traded by weight against silver across the Mediterranean. By the fourth century, demand from Rome and Greece had pushed the plant toward extinction — ancient sources claim the last known stalk was sent as a curiosity to the emperor Nero.

The city operated as a Greek colonial foundation under Libyan skies, maintaining close ties with Sparta and later Ptolemaic Egypt. BMC Greek#77 places this type within a well-documented sequence, though die linkage studies suggest multiple simultaneous workshops operating under civic rather than royal authority.