From Byzantium to Constantinople and from the to İstanbul, this fabled city, divided by the Bosphorus strait, lies in both Europe and Asia. The European side is separated into two by a scimitar-shaped gulf called the Golden Horn: the old town sprawls along one side, with its Byzantine ramparts and Ottoman palaces facing the Marmara Sea, the Propontis of antiquity; on the other side, one can see the ancient Genoese port of Galata and the more modern quarters beyond, with the legendary Bosphorus winding its way up to the Black Sea, the Pontus Euxinus of antiquity. It is this garland of waters which makes İstanbul, whose seven hills are crowned with imperial monuments, a unique city.

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