Santorini is a small, circular archipelago of volcanic islands located in the southern Aegean Sea, about 200 km southeast from Greece's mainland. It is also known as Thera, forming the southernmost member of the Cyclades group of islands. It is composed of the Municipality of Thíra (pop. 12,440) and the Community of Oía. These have a total land area of 90.623 km², which also includes the uninhabited islands of Nea Kameni, Palaia Kameni, Aspronisi, and Christiani.

It is the most active volcanic centre in the South Aegean Volcanic Arc, though what remains today is chiefly a water-filled caldera. The name Santorini was given to it by the Latin empire in the thirteenth century, and is a reference to Saint Irene. Before then it was known as Kallistē ("the most beautiful one"), Strongylē ("the circular one"), or Thera.

Info Santorini