Editing 857

{{short description|Calendar year}}
{{Use mdy dates|date=February 2011}}
{{About year|857}}
{{Year nav|857}}
{{M1 year in topic}}
[[File:Mesue. Watercolour. Wellcome V0006562.jpg|upright=1.35|thumb|[[Masawaiyh|Yuhanna ibn Masawaiyh]] (ca. 777–857)]]
__NOTOC__
Year '''857''' ('''[[Roman numerals|DCCCLVII]]''') was a [[common year starting on Friday]] of the [[Julian calendar]].

== Events ==
<onlyinclude>

=== By place ===

==== Byzantine Empire ====
* Emperor [[Michael III]], under the influence of his uncle [[Bardas]], banishes his mother [[Theodora (wife of Theophilos)|Theodora]] to the [[Sancaktar Hayrettin Mosque|Gastria Monastery]]. Bardas, the ''de facto'' [[regent]], becomes the most powerful person in the [[Byzantine Empire]].<ref name="Treadgold450-1">{{harvnb|Treadgold|1997|pp=450–451}}.</ref>

==== Europe ====
* [[November]] &ndash; [[Erispoe]], ruler ([[duke]]) of [[Kingdom of Brittany|Brittany]], is assassinated by his cousin [[Salomon, King of Brittany|Salomon]] and followers, in the church at [[Talensac]]. King [[Charles the Bald]] acknowledges Salomon as the rightful 'king' of Brittany.
* A Danish [[Vikings|Viking]] fleet raids the cities of [[Dorestad]], [[Paris]] and [[Orléans]]. Others sail up the [[Oise (river)|Oise River]], ravaging [[Beauvais]] and the [[abbey]] of [[Saint-Germer-de-Fly]] (approximate date).
* Viking chieftain [[Rorik of Dorestad|Rorik]], with the agreement of King [[Lothair II]], leaves Dorestad with a fleet and forces his rival [[Horik II]] to recognise him as ruler over [[Denmark]] (approximate date).

=== By topic ===
==== Medicine ====
* The first recorded major outbreak of [[ergotism]] kills thousands of people in the [[Rhine|Rhine Valley]]. They have eaten [[bread]] made from [[rye]] infected with the [[ergot]] fungus parasite ''[[Claviceps purpurea]]'' (approximate date).
</onlyinclude>

== Births ==
* [[Ch'oe Ch'i-wŏn]], Korean philosopher and [[Korean poetry|poet]]
* [[Li Cunjin]], general of the [[Tang dynasty]] (d. [[922]])

== Deaths ==
* [[March 11]] &ndash; [[Eulogius of Córdoba|Eulogius]], Spanish priest and [[martyr]]
* [[Dae Ijin]], king of [[Balhae]] ([[Korea]])
* [[Erispoe]], king ([[duke]]) of [[Kingdom of Brittany|Brittany]]
* [[Harith al-Muhasibi]], Muslim teacher (b. [[781]])
* [[Hilderic of Farfa]], Frankish [[abbot]]
* [[Kim Yang]], viceroy of [[Silla]] (Korea) (b. [[AD 808|808]])
* [[Masawaiyh|Yuhanna ibn Masawaiyh]], Assyrian physician 
* [[Matudán mac Muiredaig]], king of [[Ulaid]] ([[Ireland]])
* [[Ma Zhi]], [[chancellor of the Tang dynasty]]
* [[Munseong of Silla|Munseong]], king of Silla (Korea)
* [[Saint Roderick|Roderick]], Spanish [[priest]] and saint
* [[Wang Shaoding]], Chinese governor (''[[jiedushi]]'')
* [[Yahya ibn Aktham]], Muslim [[Faqīh|jurist]]
* [[Zheng Lang]], chancellor of the Tang dynasty
* [[Ziryab]], Muslim [[Islamic poetry|poet]] and [[Islamic music|musician]] (b. [[789]])

== References ==
{{Reflist}}

==Sources==
*{{cite book|last=Treadgold|first=Warren|title=A History of the Byzantine State and Society|url=https://books.google.com/books?id=nYbnr5XVbzUC|location=Stanford, California|publisher=Stanford University Press|year=1997|isbn=0-8047-2630-2}}

{{DEFAULTSORT:857}}
[[Category:857| ]]