Chapter LXVIII: "Reign of Mahomet the Second, Extinction of Eastern Empire" by Edward Gibbon Constantinople Siege & Fall (), BBC Radio 4 discussion with Roger Crowley, Judith Herrin & Colin Imber (In Our Time, 28 December 2006).
Chapter LXVIII "Reign of Mahomet the Second Extinction of Eastern Empire" by Edward Gibbon Constantinople Siege & Fall () BBC Radio 4 discussion with Roger Crowley Judith Herrin & Colin Imber (In Our Time 28 December 2006)