Pyrgos Kallistis or simply Pyrgos
is a picturesque village on the Aegean

Aegean Sea

The Aegean Sea[p] is an elongated embayment of the Mediterranean Sea located between the southern Balkan and Anatolian peninsulas, i.e., between the mainlands of Greece and Turkey. In the north, it is connected to the Marmara Sea and Black Sea by the Dardanelles and Bosporus...

 island of Santorini

Santorini

Santorini , officially Thira , is an island located in the southern Aegean Sea, about southeast from Greece's mainland. It is the largest island of a small, circular archipelago which bears the same name and is the remnant of a volcanic caldera...

, Greece

Greece

Greece , officially the Hellenic Republic , and historically Hellas or the Republic of Greece in English, is a country in southeastern Europe....

,
in the Cyclades

Cyclades

The Cyclades is a Greek island group in the Aegean Sea, south-east of the mainland of Greece; and a former administrative prefecture of Greece. They are one of the island groups which constitute the Aegean archipelago. The name refers to the islands around the sacred island of Delos...

 prefecture with a population of approx. 732 according to the 2001 census.
Pyrgos is part of the Municipality of Thira and is situated approximately 7km away from the
island's capital Fira

Fira

Firá is the modern capital of the Greek Aegean island, Santorini. It is a traditional settlement. "Firá", actually, is a different pronunciation of "Thíra", the ancient name of the island itself....

. It is built amphitheatrically

Amphitheatre

An amphitheatre is an open-air venue used for entertainment and performances.There are two similar, but distinct, types of structure for which the word "amphitheatre" is used: Ancient Roman amphitheatres were large central performance spaces surrounded by ascending seating, and were commonly used...

 on a hill that
offers magnificent views of Santorini in almost all directions. On top of this hill remain
the ruins of a Venetian

Republic of Venice

The Republic of Venice or Venetian Republic was a state originating from the city of Venice in Northeastern Italy. It existed for over a millennium, from the late 7th century until 1797. It was formally known as the Most Serene Republic of Venice and is often referred to as La Serenissima, in...

 castle (Kasteli) that was once the island's
administrative center. Pyrgos is a typical example of medieval

Duchy of the Archipelago

The Duchy of the Archipelago or also Duchy of Naxos or Duchy of the Aegean was a maritime state created by Venetian interests in the Cyclades archipelago in the Aegean Sea, in the aftermath of the Fourth Crusade, centered on the islands of Naxos and Paros.-Background and establishment of the...

architecture with narrow, labyrinthine

Labyrinth

In Greek mythology, the Labyrinth was an elaborate structure designed and built by the legendary artificer Daedalus for King Minos of Crete at Knossos...

streets, fortified walls and hidden
passages. Nowadays, is one of the least spoiled by tourism villages on Santorini.