Rising where empires once met and clashed, the Yedikule Fortress — the Fortress of the Seven Towers — has long stood as one of Istanbul's most imposing landmarks. Built in 1458 by Sultan Mehmed II, the conqueror of Constantinople, it fused the grandeur of Rome with the ambition of the Ottomans, enclosing the mighty Golden Gate of the Theodosian Walls within its new ring of towers. More than just a fortress, Yedikule became infamous as a royal dungeon, a place where ambassadors, nobles, an...