The Museum of Prehistoric Thera houses finds from the excavations at Akrtotiri, conducted under the auspices of the Archaeological Society at Athens, the earlier excavations at Potamos, made by members of the German Archaeological Institute at Athens, and rescue excavations at various other sites on the island, carried out by the 21st Ephorate of Antiquities for the Cyclades and Samos, as well as objects discovered fortuitously or handed over.