Sanctuary of Poseidon

In the northern part of the island are the remains of the Sanctuary of Poseidon, the centre of the Kalaureian amphictyony.

The exact date it was built is not known, although researchers estimate it to have been around 520 BC.

The dimensions of the temple, which is of the Doric order, are 27.4×14.4 m.

There are six columns on each short side and twelve on each long side.

It was here that Demosthenes, the famous orator, poisoned himself with hemlock in 322 BC fleeing from the Macedonian Governor Antipatros.

Source: wikipedia.org