Lecture 1. End of an empire and the beginning of the world -- Lecture 2. Empire strikes back : Justinian I and the reconquest of the West -- Lecture 3. Storm in the East : the rise of Islam -- Lecture 4. New masters of Rome : the popes -- Lecture 5. A new empire : the Carolingians -- Lecture 6. Devastation again : the new invasions of Europe -- Lecture 7. To reform and rebuild : the eleventh-century reform movement -- Lecture 8. Clash of Church and State : the investiture controversy -- Lecture 9. Crusades -- Lecture 10. Growing kingdoms : England and France -- Lecture 11. Rise and fall of the papal monarchy -- Lecture 12. Europe asunder : the Avignon papacy and the Great Schism -- Lecture 13. Hundred Years War -- Lecture 14. Europe stands alone : the fall of Constantinople.