This volume catalogues more than 400 lamps and lamp fragments dating from the Late Archaic to the Byzantine periods found over several decades at the Isthmian Sanctuary of Poseidon. These come from excavations undertaken by UCLA from 1967 to 1987 under the direction of Paul Clement and since then by OSU under the direction of Timothy Gregory. As well as the detailed descriptions of the lamps in the catalogue, the volume presents a commentary on the types of lamps used at the Sanctuary that enriches our knowledge of their manufacture, use, and artistic evolution over time. The lamps also contribute to a better understanding of the site, as they reflect the various historical, political, and religious vicissitudes at Isthmia and the Corinthia in general over the centuries. The author is one of the leading authorities in the world on lamps from ancient Greece, and her work advances our knowledge of the subject in Isthmia, the Corinthia, and beyond.