Therasia in the context of "Santorini"

Santorini caldera is a large, mostly submerged caldera, located in the southern Aegean Sea, 120 kilometers north of Crete in Greece. Visible above water is the circular Santorini island group, consisting of Santorini (known as Thera in antiquity), the main island, Therasia and Aspronisi at the periphery, and the Kameni islands at the center. It has been designated a Decade Volcano.

Oia or Ia (Greek: Οία, romanized: Oía, pronounced [ˈia]) is a small village and former community in the South Aegean on the islands of Thira (Santorini) and Therasia, in the Cyclades, Greece. Since the 2011 local government reform it has been part of the municipality of Santorini, of which it is a municipal unit. It covers the whole island of Therasia and the northwesternmost part of Santorini, which it shares with the municipal unit of Santorini. The main street is named Nikolaou Nomikou. The population was 1,087 inhabitants at the 2021 census, and the land area is 19.449 km.

Oia was previously known as Apano Meria (Απάνω Μεριά or Επάνω Μεριά, "upper side"), a name which still occurs locally as Pano Meria, and the inhabitants are still called Apanomerites (Απανωμερίτες). The Ancient Greek Oia was one of the two harbours of ancient Thera and was located in the southeast of the island, where Kamari is now.