New Navarino Fortress, Ottoman fortress in Pylos, Greece.

New Navarino Fortress is a 16th-century fortification built on high ground with thick stone walls, multiple bastions, and a moat system overlooking Pylos Bay. The structure combines engineered defenses with natural rocky slopes that provided additional protection.

Construction was ordered in 1572 by Ottoman admiral Uluç Ali Reis following the Battle of Lepanto to secure control of this strategic coastline. The fortress emerged during a period when the Ottoman Empire needed to strengthen its naval presence after military setbacks.

The mosque built inside the fortress by the Ottomans, dedicated to Murad III, was converted after Greek independence into an Orthodox church dedicated to the Transfiguration of Christ. Its lead-covered domes, cistern and minaret are described by the Ottoman traveller Evliya Çelebi, who passed through in 1668 and recorded a flourishing town of some 600 stone houses within the walls.

The fortress is open to visitors who can explore the preserved military structures and enjoy panoramic views over the bay and Mediterranean. Sturdy footwear is advisable due to uneven paths and steps throughout the site.

Evliya Çelebi, who passed through in 1668, recorded 12 gates, 33 tiled houses inside the citadel and 600 stone houses in the lower fortress, plus 85 shops and the mosques of Murad III and Ferhad Agha. The citadel was later used for a long time as a prison.