843

Centuries:	[[8Template:Ordinal/th century]] - [[9Template:Ordinal/th century]] - [[10Template:Ordinal/th century]]
Decades:	810s 820s 830s - 840s - 850s 860s 870s
Years:	840 841 842 - 843 - 844 845 846

843 by topic v • d • e</div>
Politics
State leaders - Sovereign states
Birth and death categories
Births - Deaths
Establishment and disestablishment categories
Establishments - Disestablishments

Events

The Treaty of Verdun divides the Carolingian Empire between the 3 sons of Louis the Pious (Charles the Bald, Lothar and Louis the German).
Kenneth I (Cináed mac Ailpín), King of the Scots, also becomes King of the Picts, thus becoming the first monarch of the new nation of Scotland. The Alpin dynasty of Scottish kings begins to reign.
the Battle of Messac is won by Erispoe, son of Nominoe, king of Brittany, against Renaud d'Herbauges who is prefet of the Marks of Brittany. Renaud d'Herbauges had tried an attack while Nominoe was ill. This battle marks the beginning of the hostilities between Charles the Bald and Nominoe.

In the Tang Dynasty Chinese capital of Chang'an, a large fire consumes 4,000 homes, warehouses, and other buildings in the East Market, yet the rest of the city is at a safe distance from the blaze (which is largely quarantined in East Central Chang'an thanks to the large width of roads in Chang'an that produce fire breaks).