The coastal region between İzmir and Edremit bays was known as Aeolis. According to ancient sources Aeolis was founded by the descendants of Agememnon. Lesbos was the most important city. There was immigration from Mytilen to Asia Minor in 7th century B.C. The 12 southernmost cities were grouped in an Aeolian League. The inhabitants of Aeolian cities were primarily engaged in agriculture; they did not play a prominent role in the history, but were creative in music and poetry. Sappho, Alkaios and Terpander, the inventors’ of the seven-tone musical scale, were from Aeolis.