Ancient Thera is an antique city on a ridge of the steep, 360 m high Messavouno mountain on the island of Santorini. It was named after the mythical ruler of the island, Theras, and was inhabited from the 9th century BCE until 726 CE. Starting in 1895 the city was systematically excavated there until 1904 and in 1961 and 1982. Findings from these excavations are on exhibit at the archaeological museum in Fira town. Excavation work was again taken up between 1990 and 1994.
Ancient Thera is today open to the public and can be reached on a winding road that starts at Kamari or several foot paths from both sides of the mountain