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Rediscovered Temple of Poseidon in Greece Larger Than Initially Assumed

Panoramic view of the Temple of Poseidon at Kleidi, Samikon, Greece.
Panoramic view of the Temple of Poseidon at Kleidi, Samikon, Greece. Credit: Greek Ministry of Culture and Sports

Latest excavations at the recently rediscovered temple of Poseidon at Kleidi, Samikon, Greece, revealed that the building is larger than what archaeologists had previously assumed.

The long-lost temple of Poseidon in Peloponnese peninsula, an important religious site of the ancient Greek world, was only rediscovered in 2022, thanks to a collaborative research project between the Ephorate of Antiquities of Ilia and the Austrian Archaeological Institute of the Austrian Academy of Sciences, under the direction of Dr. Birgitta Eder and Dr. Erofili Kolia.

Archaeologists had been searching for the location of the temple in the area’s marshlands for over a century before recent excavations could bear fruit.

4th century b.C. pottery found at the Temple of Poseidon at Kleidi, Samikon, Greece.
4th century b.C. pottery found at the Temple of Poseidon at Kleidi, Samikon, Greece. Credit: Greek Ministry of Culture and Sports

Function of second room in Poseidon’s temple remains a mystery

The 2023 excavation period at Samikon, concluded at the end of September, made it apparent that the dimensions of the sanctuary are larger than the original estimate, based on the geophysical survey, had suggested.

Although the total length of the structure that was dedicated by the ancient Greeks to the almighty God of the Seas, is still estimated at about 28 metres, its width now seems to exceed 9 metres.

Layout of the Temple of Poseidon at Kleidi, Samikon, Greece.

Experts were able to define that the discovery is a 6th century BC temple with two building phases.

“According to more recent evidence, it seems that this temple was a cult building within the famous sanctuary of Poseidon, which was an important religious centre of the Amphictyony of the cities of Triphylia,” the Athens Branch of the Austrian Archaeological Institute explains.

4th century b.C. pottery found at the Temple of Poseidon at Kleidi, Samikon, Greece. Credit: Greek Ministry of Culture and Sports
4th century b.C. pottery found at the Temple of Poseidon at Kleidi, Samikon, Greece. Credit: Greek Ministry of Culture and Sports
It was built in Archaic times, but seems to have been reconstructed in the second half of the 4th – early 3rd century BC, and consists of two main halls and a smaller one in the rear part.
The function of the two main rooms is still unclear, and experts believe that perhaps two deities were worshipped, or the second hall could have served as the seat of the Triphylian amphictyony.
Excavated area at the Temple of Poseidon at Kleidi, Samikon, Greece.
Excavated area at the Temple of Poseidon at Kleidi, Samikon, Greece.. Credit: Greek Ministry of Culture and Sports
Archaeologists puzzled by “unusual floor plan”
Research found out that when the temple was rebuilt, the tiles from the old roof were reused, as they were laid evenly as a subfloor for the new phase.
The room, which was originally interpreted as a pronaos, turned out to be one of the rooms of the cella, in which the bases of two columns of a colonnade were found on the axis of the building, belonging to the Archaic phase.
A column base at the main colonnade of the Temple of Poseidon at Kleidi, Samikon, Greece.
A column base at the main colonnade of the Temple of Poseidon at Kleidi, Samikon, Greece. Credit: Greek Ministry of Culture and Sports
“We can assume that there were similar columns in the second room as well. In any case, the floor plan of the temple is unusual, with no precise parallel,” the archaeologists add.

As the research project continues through to 2026, funded by the Gerda Henkel Stiftung and the Austrian Archaeological Institute at Athens, the team of experts will look to identify more evidence of the extent and form of the sanctuary.

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