821
Encyclopedia
Year 821 was a common year starting on Tuesday
(link will display the full calendar) of the Julian calendar
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Common year starting on Tuesday
This is the calendar for any common year starting on Tuesday, January 1 . Examples: Gregorian years 1985, 1991, 2002, 2013 and 2019or Julian year 1919 .MillenniumCenturyGregorian Year2nd Millennium:...
(link will display the full calendar) of the Julian calendar
Julian calendar
The Julian calendar began in 45 BC as a reform of the Roman calendar by Julius Caesar. It was chosen after consultation with the astronomer Sosigenes of Alexandria and was probably designed to approximate the tropical year .The Julian calendar has a regular year of 365 days divided into 12 months...
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Asia
- Tang Mu Zong becomes emperor of ChinaChinaChinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
. - First recorded session of the Parliament of Croatia
Byzantine Empire
- The Byzantine general Thomas the SlavThomas the SlavThomas the Slav was a 9th-century Byzantine military commander, most notable for leading a wide-scale revolt against Emperor Michael II the Amorian in 820–823....
secures control over most of Byzantine AnatoliaAnatoliaAnatolia is a geographic and historical term denoting the westernmost protrusion of Asia, comprising the majority of the Republic of Turkey...
as well as recognition from the Abbasid Caliphate, and crosses over into Europe. The emperor Michael IIMichael IIMichael II , surnamed the Amorian or the Stammerer , reigned as Byzantine emperor from December 820 to his death on 2 October 829, and the first ruler of the Phrygian or Amorian dynasty....
is blockaded in ConstantinopleConstantinopleConstantinople was the capital of the Roman, Eastern Roman, Byzantine, Latin, and Ottoman Empires. Throughout most of the Middle Ages, Constantinople was Europe's largest and wealthiest city.-Names:...
, but Thomas' first attack on the city fails.
Deaths
- February 11 – Benedict of AnianeBenedict of AnianeSaint Benedict of Aniane , born Witiza and called the Second Benedict, was a Benedictine monk and monastic reformer, who left a large imprint on the religious practice of the Carolingian Empire...
, monastic founder and saint - December 18 – Theodulf, Bishop of Orléans
- CoenwulfCoenwulf of MerciaCoenwulf was King of Mercia from December 796 to 821. He was a descendant of a brother of King Penda, who had ruled Mercia in the middle of the 7th century. He succeeded Ecgfrith, the son of Offa; Ecgfrith only reigned for five months, with Coenwulf coming to the throne in the same year that Offa...
, king of MerciaMerciaMercia was one of the kingdoms of the Anglo-Saxon Heptarchy. It was centred on the valley of the River Trent and its tributaries in the region now known as the English Midlands...