Editing 833 (section)

=== By place ===
==== Byzantine Empire ====
* [[Arab–Byzantine wars|Byzantine-Arab War]]: Emperor [[Theophilos (emperor)|Theophilos]] signs an [[armistice]] for peace with the [[Abbasid Caliphate]]. He offers Caliph [[Al-Ma'mun]] 100,000 gold [[dinar]]s, in return for 7,000 [[Byzantine Empire|Byzantine]] prisoners.<ref name="Nor">J. Norwich, ''Byzantine: The Apogee'', p. 47.</ref>

==== Europe ====
* [[June]] &ndash; [[Lothair I]], eldest son of Emperor [[Louis the Pious]], joins the rebellion of his brothers [[Pepin I of Aquitaine|Pepin I]] and [[Louis the German]], with the assistance of Archbishop [[Ebbo]]. Louis is forced to abdicate, on the [[Field of Lies|plains of Rothfield]] (near [[Colmar]]). 
* [[Mojmir I of Moravia|Mojmir I]], Moravian duke, expels Prince [[Pribina]] from his homeland (western part of modern [[Slovakia]]). He unifies [[Great Moravia]] and becomes the first known ruler of the Moravian [[Slavs]], who founds the [[House of Mojmir]] (approximate date).
* [[Galindo Aznárez I]], Frankish count, usurps the [[Principality of Catalonia|Catalan]] counties (''[[Pagus|pagi]]'') of [[County of Pallars|Pallars]] and [[County of Ribagorza|Ribagorza]], in the [[Marca Hispanica|Spanish March]] (modern [[Spain]]), a [[buffer zone]] between the [[Pyrenees]] and the [[Ebro|Ebro River]].

==== Abbasid Caliphate ====
[[File:Al-Maʾmūn.png|200px|thumb|right|Caliph [[Al-Ma'mun|al-Mamun]] (r. 813–833) of the Abbasid dynasty]]
* [[August 7]] &ndash; Caliph [[Al-Ma'mun]] dies after a 20-year reign. He is succeeded two days later by his half-brother [[al-Mu'tasim]], as ruler of the [[Abbasid Caliphate]].
* [[Ibn Hisham]], Muslim historian, collects oral traditions that form the basis for the biography of the [[Prophets and messengers in Islam|Islamic prophet]] [[Muhammad]].

==== Japan ====
* [[Emperor Junna]] abdicates the [[throne]], after a 10-year reign. He is succeeded by his nephew [[Emperor Nimmyo|Nimmyō]], as the 54th [[emperor of Japan]].
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