Now in trade paperback, a gripping exploration of the fall of Constantinople and its connection to the world we live in today The fall of Constantinople in 1453 signaled a shift in history, and the end of the Byzantium Empire. Roger Crowley's readable and comprehensive account of the battle between Mehmed II, sultan of the Ottoman Empire, and Constantine XI, the 57th emperor of Byzantium, illuminates the period in history that was a precursor to the current jihad between the West and the Middle East.