Calendar overview 851
|Aghlabids build the Great Mosque of Sousse .|
|851 in other calendars|
|Armenian calendar||299/300 (turn of the year July)|
|Buddhist calendar||1394/95 (southern Buddhism); 1393/94 (alternative calculation according to Buddha's Parinirvana )|
|Chinese calendar||59th (60th) cycle|
|Chula Sakarat (Siam, Myanmar) / Dai calendar (Vietnam)||213/214 (turn of the year April)|
|Iranian calendar||229/230 (around March 21)|
|Islamic calendar||236/237 (July 4th / 5th)|
|Jewish calendar||4611/12 (August 30/31)|
from urbe condita MDCIV (1604)
Diocletian's era : 567/568 (New Year November)
|Seleucid era||Babylon: 1161/62 (turn of the year April)
Syria: 1162/63 (turn of the year October)
|Vikram Sambat (Nepalese Calendar)||907/908 (turn of the year April)|
Politics and world events
- Viking Age : The Vikings raid the English island of Thanet .
- Ethelwulf von Wessex wins over the Danish prince Rorik at Ockley.
- Nominoë , Duke of Brittany, seizes the city of Rennes , capital of the county of the same name, which belonged to the Breton Mark of the Franconian Empire under Charlemagne .
First documentary mentions
- First mention of today's Witten district of Herbede
- First written mention of the place Bochorna , (today Bokern, city of Damme near Osnabrück) as a night camp on the 'Oberhof' (Meyerhof) in connection with the transfer of the bones of St. Alexander from Rome to Wildeshausen
- First written mention of the place Wallonhurst , today's Wallenhorst , in the writing De miraculis sancti Alexandri
- First written mention of the place Wilshem , today's Wilsum , in the writing De miraculis sancti Alexandri
- Marsens and Tegerfelden are first mentioned in a document.
Religion and culture
- The Liudolfinger Altfrid becomes Bishop of Hildesheim .
- The Arab merchant Sulaiman spread Islam on the Indian Malabar coast .
- Construction of the Great Mosque of Sousse , under the Emir of the Aghlabids , Abū ʾl-ʿAbbās Muhammad I.
- March 7th : Nominoë , Breton prince
- March 20 : Irmingard von Tours , wife of Emperor Lothar I (* around 795 )
- March 20 : Ebo of Reims , Archbishop of Reims and Bishop of Hildesheim (* around 778 )