Limnos Sights & Monuments - Kotsinas Castle in Limnos, Greece was a crucial stronghold in controlling the sea route to historical Constantinople, now known as Istanbul. Constructed by renowned Venetian Filocalo Navigajiosi, the Great Duke, the castle served as the primary defense against invading forces. Deep inside the castle walls lies the underground temple of Zoodohos Pigi, and the source of the "holy water" that once provided the castle with water. Though only the defensive walls on the hill of Kotsinas remain, Kotsinas Castle remains a must-see attraction for visitors to Limnos seeking a glimpse into the island's history.

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