851
| Years: 847 848 849 850 - 851 - 852 853 854 855 | |
| Decades: 820s 830s 840s - 850s - 860s 870s 880s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- Vikings plunder London
- Charles the Bald, Louis the German and Lothar meet in Meersen
- Oldest known mention of the Andaman Islands
- Garcia Iñiguez succeeds his father Iñigo Arista as king of Navarra
Deaths
- Irmengarde, wife of emperor Lothar
- March 7 - Nominoe, Duke of Brittany
- Ebo - or Ebbo - of Reims, Archbishop of Reims and bishop of Hildesheim (Link: http://www.bautz.de/bbkl/e/ebo_v_r.shtml)