AGIOS PETROS TOWER
Agios (Saint) Petros Tower, Hellenistic era (4th-3rd century B.C.), is one of the best preserved in Cyclades islands. It has cylindrical shape and its height is 20m. The base diameter is 9.40m and is made of local schist. In the interior there is a helical stair, which in the past was leading to at least five floors.
The tower is built at an ideal location, since it overlooks Gavrio area and the sea routes. In the nearby area there are copper extraction installations, in function till mid 20th century, with indications of ancient similar activities. Obviously the purpose of this monument was the control over land and sea.