Calendar overview 866
|Basilius murdered with the knowledge of the Byzantine emperor Michael III. his uncle and regent Bardas .|
|866 in other calendars|
|Armenian calendar||314/315 (turn of the year July)|
|Buddhist calendar||1409/10 (southern Buddhism); 1408/09 (alternative calculation according to Buddha's Parinirvana )|
|Chinese calendar||59th (60th) cycle|
|Chula Sakarat (Siam, Myanmar) / Dai calendar (Vietnam)||228/229 (turn of the year April)|
|Iranian calendar||244/245 (around March 21)|
|Islamic calendar||251/252 (January 21/22)|
|Jewish calendar||4626/27 (September 13-14)|
from urbe condita MDCXIX (1619)
Diocletian's era : 582/583 (November turn of the year)
|Seleucid era||Babylon: 1176/77 (turn of the year April)
Syria: 1177/78 (turn of the year October)
|Vikram Sambat (Nepalese Calendar)||922/923 (turn of the year April)|
Politics and world events
- With the knowledge of the Byzantine emperor Michael III. The groom Basilius murders his uncle Bardas and is involved in the rule as Caesar .
Northern and Western Europe
- September 15 : Viking Age : At the Battle of Brissarthe , West Franconia under Robert the Brave and Loire-Normans under Hasting face off.
- The Great Pagan Army , which had been roaming around England since the previous year, conquered the Anglo-Saxon Kingdom of Northumbria .
- From Dublin , Norwegian Vikings undertake extensive raids into Scotland .
- In Asturias , King Alfonso III follows . ("The great") his father Ordoño I on the throne and moves the capital to León .
- Alfonso the Great of Asturias conquered Coimbra from the Moors during the Reconquista .
- January 11th : When, after several months of eventful fighting, the Turkish troops of al-Musta'in bi-llahs overflow into the opposing camp, the latter has to capitulate and abdicate. Despite security guarantees, he was murdered on October 17th in his exile in Wasit , southern Iraq . His opponent al-Mu'tazz bi-llah is Caliph of the Abbasid . However, he can only rely on the Turkish troops in his rule, as the Tahirids in Khorasan and the Arabs supported al-Musta'in during the civil war. In order to reduce this strong dependence on the Turks, he tries to play off the Turkish commanders against each other. The power struggles at the Caliph's court of Samarra continue unabated.
First documentary mentions
- The name Holland is first mentioned as Holtland (woodland or woodland) for the area around Haarlem .
- Courrendlin , Miécourt , Orvin , Sonceboz-Sombeval , Tavannes and Vicques are first mentioned in a document.
- September 19 : Leo VI. , Emperor of Byzantium († 912 )
- Karlmann , French King († 884 )
- Robert I , King of the West Franconia († 923 )
Date of death secured
- April 21 : Bardas , Byzantine regent
- May 27th : Ordoño I , King of Asturias
- June 21 : Radulf von Bourges , Archbishop (* around 800 )
- June 22nd : Emenon , Count of Poitou and Angoulême
- July 16 : Irmgard von Chiemsee , daughter of Ludwig the German
- September 29th : Charles the child , West Franconian sub-king (* around 849 )
- October 17 : Al-Musta'in bi-llah , Abbasid Caliph (* 836 )
- December 16 : Eberhard von Friuli , Margrave of Friuli (* 810 )
- December 22nd : Hungerus Frisus , Bishop of Utrecht (* around 800 )
Exact date of death unknown
- Hartwig von Passau , bishop
- Liudolf , Count in Saxony (* 805 or 806 )
- Ranulf I , Count of Poitou, Duke of Aquitaine and Abbot of Saint-Hilaire-de-Poitiers (* around 820 )
- Robert the Brave , Count of Paris, Tours and Anjou