830sCenturies: 8th century - 9th century - 10th century
- The first Swedes arrive in Russia. (The Rus, from Roslagen)
- The Viking raids in Western Europe get more severe. They plunder Dorestad and establish themselves in Ireland.
- Louis the Pious and his sons fight about the division of the empire.
- Second Iconoclastic period in Byzantium (813-843).