In Volume V (Chapters XLVII-LVI), Edward Gibbon further explores the influence of Christianity on the fall of the Roman Empire. He looks at the growth of the worship of Christian images and the resulting persecution by Leo III, emperor of the East. The conflict is intensified as a split develops between the Eastern and Western churches, a weakness that encourages attacks from Lombardy. Gibbon then moves to the foundation of the Moslem religion and the attempts by the Arabs to besiege Constantinople.]