books.google.com - This title details the epic four-month siege of the city of Constantinople, last vestige of the once mighty Roman and Byzantine Empires. Mehmet 'The Conqueror' led an army of 80,000 men with a massive siege train against the city. Defending were a mere 10,000 men under the Emperor Constantine XI. The...http://books.google.com/books/about/Constantinople_1453.html?id=9yGRZTZhlDQC&utm_source=gb-gplus-shareConstantinople 1453