778. Spain is invaded by Charlemagne; on his return to repel the Saxons his rear-guard is surprised; there ensues the "Dolorous Rout" of Roncesvalles. See [CAREER OF CHARLEMAGNE], iv, 334.
780. The government of the Eastern Empire is assumed by Irene in the name of her son, Constantine VI.
781. Charlemagne visits Rome; his two sons are crowned by the Pope—one king of Italy, the other of Aquitaine.
785. Irene proposes a general council to establish the worship of images.
Fierce struggle of the Saxons against Charlemagne; Wittikind and Alboin submit and profess Christianity.
786. On the death of Al Hadi, the famous Harun-al-Rashid succeeds to the eastern caliphate.
787. Second Council of Nice—- the seventh general council of the Church; it decrees the worship of images.
788. Bavaria is brought completely under the sway of Charlemagne.
789.[85] The first recorded inroad of the Northmen (Danes) into England.
790.[86] Publication of the Caroline Books, being the judgments of the general council of the bishops of the West on certain religious dogmas.