The History of the Decline and Fall of the Roman Empire, by Edward Gibbon

Chapter LXVIII: Reign Of Mahomet The Second, Extinction Of Eastern Empire

Reign And Character Of Mahomet The Second.—Siege, Assault, And Final Conquest, Of Constantinople By The Turks.—Death Of Constantine Palæologus.—Servitude Of The Greeks.—Extinction Of The Roman Empire In The East.—Consternation Of Europe.—Conquests And Death Of Mahomet The Second.