Rio Castle, Medieval fortress at Rio peninsula, Greece
The castle structure features two entrance gates, with the northern section facing the sea and the southern part protected by a seawater-filled moat.
Sultan Bayezid II ordered the construction of Rio Castle in 1499 on the foundations of an ancient temple of Poseidon, completing it within three months.
The castle contains a chapel named Life-giving Spring, which was added during the Venetian period along with several architectural modifications to the structure.
The fortress stands at the entrance of the Corinthian Gulf, directly beneath the Rio-Antirio Bridge, and can be accessed from the Patra-Athens highway.
From 1831 to 1912, the castle served as both a military and civilian prison, where inmates maintained the streets of Rio under municipal supervision.
Location: Municipality of Patras
GPS coordinates: 38.31140,21.78120
Latest update: March 4, 2025 12:48
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