AD 846: The Arab raid against Rome took place, with plundering taking place in the outskirts of the city, but the city proper being protected by the Aurelian Walls.
AD 843: The Treaty of Verdun was signed, ending the Carolingian civil war and dividing the Carolingian Empire between Lothair I, Louis II and Charles II, the surviving sons of the emperor Louis I.
AD 829: Emperor Michael II dies after an 8-year reign in Constantinople, and is succeeded by his 16-year-old son Theophilos, as sole emperor of the Byzantine Empire.