If one had but a single glance to give the world, one should gaze on Istanbul. ~Alphonse de Lamartine
Özgür Nevres, inside Rumeli Feneri castle in 2014
The Rumeli Feneri castle is built by the Genoese, but during the Ottoman period, the original medieval fortification was totally redesigned to place many cannon there. Because for many centuries the Black Sea was an Ottoman lake, the change must have occurred in the late 18th century or even later.