title: 856
text: # 856
  
  Year 856 (DCCCLVI) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar.
  
  ## Events
  
  ### By place
  
  **Byzantine Empire**
  
  * March 15 – Emperor Michael III overthrows the regency of his mother Theodora. He appoints his uncle Bardas as the de facto regent and co-ruler of the Byzantine Empire.
  
  **Europe**
  
  * King Charles the Bald cedes the county of Maine to Erispoe, ruler (duke) of Brittany—this in return for an alliance against the Vikings.
  * King Ordoño I of Asturias is said to have begun the repopulation of the town of León in the northwest of Spain (approximate date).
  
  **Britain**
  
  * October 1 – King Æthelwulf of Wessex marries the 12- or 13-year-old Judith, daughter of Charles the Bald, at Verberie (Northern France). She is crowned queen and anointed by Hincmar, archbishop of Reims. The marriage is a diplomatic alliance between Wessex and the West Frankish Kingdom.
  * Winter – Æthelwulf returns to Wessex to face a revolt by his eldest son Æthelbald, who usurps the throne. Æthelwulf agrees to give up the western part of his kingdom, in order to avoid a civil war. He keeps control over Sussex, Surrey, Essex and Kent, over which Prince Æthelberht has presided.
  
  ### By topic
  
  **Geology**
  
  * November (approximate date) – An earthquake in Corinth, Greece kills an estimated 45,000 people.
  * December 3 – Another earthquake strikes the Abbasid Caliphate (modern-day Tunisia), also killing an estimated 45,000 people.
  * December 22 – Another earthquake strikes Damghan (modern-day Iran), killing an estimated 200,000 people.
  
  ## Births
  
  * October 24 – Li Keyong, Shatuo governor (jiedushi) (d. 908)
  * Li Maozhen, Chinese warlord and king (d. 924)
  
  ## Deaths
  
  * January 7 – Aldric, bishop of Le Mans
  * February 4 – Rabanus Maurus, archbishop of Mainz
  * August 6 – Fujiwara no Nagara, Japanese statesman (b. 802)
  * August 16 – Theutbald I, bishop of Langres
  * Florinus of Remüs, Frankish priest and martyr
  * Godfrid Haraldsson, Viking chieftain (approximate date)
  * Guerin, Frankish nobleman (or 845)
  * Ilyas ibn Asad, Muslim emir (approximate date)
  * Muhammad I Abu 'l-Abbas, Muslim emir
  