Christendom and Islam.
Chapter LII.
Old Rome and New Rome.
Chapter LIII.
An Emperor-Priest and four great Popes.
Chapter LIV.
Rome's Three Hundred Years, 455-756, from Genseric to Aistulf, between the Goth, the Lombard, and the Byzantine.
Chapter LV.
From Servitude to Sovereignty.
Chapter LVI.