The Roquebrune-Cap-Martin Chateau is a stark, defensive 10th-century castle looking out over the Mediterranean from a rock peak above the village of Roquebrune-Cap-Martin. The high, crenelated donjon tower is the oldest in France, and the castle is open to visitors.
The Roquebrune-Cap-Martin Castle dominates the village, along with the rest of the Mediterranean coast east of Monaco. It was built in the 10th century as a defense against the return of the Barbarian Invasions and Saracens.
The original castle was larger than just the towers on top of the rock, and included the walled village. One of the original Medieval fortified gates still stands, at the east end of the village, on the wide Rue de Souta Riba.