Unión matemática internacional
This page relates to the year 821 Calendrier Julien.
Events
- the treaty sino - Tibetan of Chang' year recognizes the independence of the Tibet. Signed after vain skirmishes in the North-West. The text, which fixes the limits of the two empires, is written in Chinese and Tibetan on three pillars with Chang' year, the tibéto-Chinese border and Lhassa.
- Revolt of the Byzantine general Thomas Slavic the against Michel II the Stammerer (fine in 823). It besieges Constantinople in December with the assistance of Caliph Al-Mamun.
- Return to the capacity of the former advisers of Charlemagne, Adalhard, abbot of Corbie and the half-brother of the emperor, Wala, former governor of Saxony.
- Bernard de Septimanie, count of Toulouse, order the walk of Spain.
- September 17th: A charter of Louis Ier the Piles or Débonnaire grants royal protection to Castellanus and its already important community of the Holy Abbey Marie of Arles-on-Tech, in the Roussillon reconquered on the Sarrasins by his/her father Charlemagne.
Art & culture
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In the Egyptian part of the Arabia, the women have access to the studies.
- Rebuilding of the twelve bridges on the the Seine.
- Vita Caroli , of Eginhard.
- Life of Saint Philatêros.
Births in 821
Death in 821
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February 11th: Saint Benoit d' Aniane (Witiza).
- December 18th: Théodulphe, bishop of Orleans, close collaborator of Charlemagne
- Adrien of Orleans (°v. 760), count d' Orléans, Count Palatine.
- Coenwulf, king of Mercie.
Map-bms: 821
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