On the slopes of Mount Skollis, where the boundary between Achaea and Elis runs through scrub and limestone, there is a castle whose name carries its founder's identity across seven centuries. Nicholas of Saint-Omer built it in 1311 and called it his own, and the Greek rendering of Saint-Omer — Santameri — has clung to the ruins ever since. The Frankish lords who built castles across the Greek Peloponnese after the Fourth Crusade gave their names to many of these places, but most of those names faded. This one did not.
Nicholas III of Saint-Omer was lord of Thebes when he built Santameri in 1311, and he chose his site with care. The summit of Skollis commands views across the Elean fields to the west and guards the mountain passes that lead toward Tritaia in Achaea. The Venetians, who catalogued everything in their domain, recorded it under the name Edrolcamo — the Greek Εντρόλκαμο — in their administrative records. Under whatever name, the castle was recognized as one of the strongest in the region.
Around the fortress, a city grew. At its peak, Santameri was home to 1,500 houses — a substantial urban presence for a hilltop in medieval Achaea. The Frankish Principality of Achaea, which had controlled much of mainland Greece since the early thirteenth century, needed such strongpoints: the Byzantine Empire had never fully accepted the loss of this territory, and the pressure from Byzantium was constant.
The Byzantines tried to take Santameri repeatedly. They failed every time. The castle's elevated position, its walls, and the difficulty of supplying a siege in the mountains all worked against them. At some point during the castle's long Frankish-and-Navarrese tenure — the Aragonese version of the Chronicle of the Morea records this — the Byzantines mounted an especially serious assault. The result was catastrophic for them: 1,500 men and 500 horses were lost in the battle that followed, according to that source.
The Navarrese, who controlled the castle at the time of that assault, were one of several western European powers that held various parts of Greece during the complicated medieval politics of the Peloponnese. Santameri passed through different hands across the fourteenth and early fifteenth centuries, remaining in western European control against Byzantine efforts to reclaim the peninsula.
In 1429, Santameri Castle changed hands not through siege or battle but through marriage. Constantine Palaeologus — who would later become the last Byzantine emperor, dying when Constantinople fell to the Ottomans in 1453 — was then the Despot of the Morea, the Byzantine ruler of the southern Peloponnese. He married Theodora Tocco, daughter of Leonardo II Tocco, lord of the Ionian Islands. Santameri and Chlemoutsi castle were given as Theodora's dowry.
The marriage was brief. Theodora died the following year, 1430, during childbirth. She was buried at Santameri — in the place that had come to her family as part of the dowry that had also come to define her short life. After some years, her remains were transferred to Mystras, the Byzantine hilltop city in the Peloponnese that served as the Despotate's capital. The tomb's original site, in the locality now called Patrini outside the castle walls, is still noted.
Santameri fell to the Ottomans in 1460. Many of its inhabitants were killed; others were sold into bondage as enslaved people. The city of 1,500 houses was abandoned and did not recover. By the time the Ottoman conquest of the Peloponnese was complete, Santameri was a ruin.
What the centuries left behind is substantial enough to visit. The walls still stand in significant sections. Ruins of buildings and a Byzantine church survive within the circuit. The hilltop remains what it always was — a commanding position above the Achaean plain, the Elean fields, and the mountain routes between them. The name Santameri, carrying Saint-Omer's identity across seven hundred years, persists in the landscape even after the city, the Frankish lords, and the Byzantine despots who inherited it have all become history.
Santameri Castle sits at approximately 37.99°N, 21.58°E on Mount Skollis, which rises between Achaea and Elis in the northwestern Peloponnese. Araxos Airport (LGRX) is the nearest major airfield, approximately 25 km to the northwest along the Gulf of Patras coast. At 4,000–6,000 feet, Mount Skollis is visible as a prominent massif standing apart from the coastal plain, with the castle ruins accessible on its slopes. The Gulf of Patras is visible to the north, with Patras itself to the northeast. Visibility is excellent in summer; approach from the coast and track east-southeast from the airport to pick up the Skollis massif against the Arcadian mountains behind it.