Ephesus; Ancient Greek city of Asia Minor, near the mouth of the Menderes River, in what is today West Turkey, South of Smyrna (now Izmir). One of the greatest of the Ionian cities, it became the leading seaport of the region. Its wealth was proverbial. The Greek city was near an old center of worship of a native nature goddess, who was equated with the Greek Artemis, and c.550 B.C. a large temple was built. To this Croesus, who captured the city, contributed.