The Citadela Fortress in Marina was built in the 15th century due to the danger of Ottoman attack. It was connected by a drawbridge to the Marina Tower, with which it formed a unique defensive structure. The fortress had a rectangular ground plan and was built of stone. To this day, only the remains of the citadel fortress with the church of St. John the Baptist in the center of the village are preserved.

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№5 of 10 places in Gradic Marina
№1001 of 2178 places in Croatia
№1 of 2 Ruins and archeological sites in Gradic Marina
№13 of 101 Ruins and archeological sites in Croatia