Originally published: 1970.

Includes bibliographical references.

I The Empire of the Antonines 1 -- II The House of Severus 40 -- III Aurelian and the Restoration of the Empire 68 -- IV Diocletian 104 -- V The Progress of Christianity in the Pagan Empire 123 -- VI Church and State in the Roman Empire: the Persecution of Diocletian 188 -- VII The Rise of Monasticism 213 -- VIII The Foundation of Constantinople 230 -- IX Julian the Apostate and the Pagan Reaction 247 -- X Theodosius the Great and the Final Destruction of Paganism 268 -- XI Theology and Faction in the Eastern Empire 293 -- XII The End of the Western Empire 325 -- XIII The Gothic Kingdom of Italy 336 -- XIV Justinian 353 -- XV The Lombard Invasions and Pope Gregory the Great 395 -- XVI Heraclius 411 -- XVII The New Byzantine Empire 436 -- XVIII Mohammed 443 -- XIX The Arab Attack on Europe 487 -- XX The Iconoclastic Movement 504 -- XXI Byzantine Enlightenment, Roman Darkness 524 -- XXII The Crusades 534 -- XXIII The Mongol Invasions and the Rise of the Ottoman Turks 571 -- XXIV The Fall of Constantinople 591 -- XXV Medieval Rome 626.