Sinop FortressSinop Fortress is a historic castle in Sinop, Turkey.LocationThe castle is located in Sinop district of Sinop Province, at the northern most point of Turkiye. The historical Sinop Fortress Prison is situated in the castle.HistorySinop Fortress was built in the 8th century by immigrants coming from Miletus. The Genoese improved the fortress. The castle was included in the List of [World Heritage Sites in Turkey (tentative list)|World Heritage Tentative List] in 2013. The castle underwent restoration starting in 2019.ArchitectureLength of the bastions and walls are 2,000 meters. Bastions are 8 meters wide and 25 meters high.