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Centuries: 8th century - 9th century - 10th century Decades: 810s 820s 830s 840s 850s - 860s - 870s 880s 890s 900s 910s Years: 855 856 857 858 859 - 860 - 861 862 863 864 865 Events First attack on Constantinople by Kievan Vikings (the Rus). Ethelbert succeeds as king of Wessex. Byzantine missionaries Cyril and Methodius arrive in Khazaria. The later Harald I of Norway becomes king. Michael I[?] succeeds Sophronius I[?] as patriarch of Alexandria. Births Hrolf Ganger, Viking leader, later duke (or count) of Normandy Deaths Ethelbald, king of Wessex Halfdan the Black, king of parts of Norway
Centuries: 8th century - 9th century - 10th century
Decades: 810s 820s 830s 840s 850s - 860s - 870s 880s 890s 900s 910s
Years: 855 856 857 858 859 - 860 - 861 862 863 864 865
Births
Deaths