The Museum of Prehistoric Thera (Greek: Μουσείο Προϊστορικής Θήρας) is located in Fira, on the island of Santorini in Greece.
The Museum houses a very large number of ancient artifacts from various excavations on Santorini, such as at Akrotiri (southwest part of the island, located on a peninsula), and at the nearby Potamos site.
The earliest excavations on Santorini were conducted by French geologist F. Fouque in 1867, after some local people found old artifacts at a quarry.
Later, in 1895-1900, the digs by German archeologist Baron Friedrich Hiller von Gaertringen revealed the ruins of ancient Thera on Mesa Vouno.
The collections are ordered chronologically, and include ceramics, sculptures, jewellery, wall paintings, and ritual objects.