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Year 816 (DCCCXVI) was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar, the 816th year of the Common Era (CE) and Anno Domini (AD) designations, the 816th year of the 1st millennium, the 16th year of the 9th century, and the 7th year of the 810s decade.

Events

By place

Europe

• October 5 – King Louis the Pious (son of Charlemagne) is crowned emperor of the Holy Roman Empire, by Pope Stephen IV at Reims. He also crowns the emperor's wife Ermengarde as Holy Roman Empress. The ceremony in Reims re-establishes the principle of papal supremacy, by recognising the importance of the pope in imperial coronations. Louis gives the pope many gifts, including the estate tax Vendeuvre, near Troyes (Northern France).
• Vikings raid Ireland at the Kingdom of Munster, at Inish Cathaigh.
• Battle of Pancorbo: A Moorish army from the Emirate of Córdoba is sent by Emir Al-Hakam I, to take control of the pass at Pancorbo. They defeat the army of Asturian-Basque Frankish vassals.
• Winter – The Basques, supported by the Moors, cross the Garonne River and revolt against the Franks in Gascony (north of the Pyrenees).

Britain

• King Hywel of Gwynedd is attacked by his brother Cynan on Anglesey (modern Wales), who is killed during the fighting (approximate date).

Abbasid Caliphate

• Babak Khorramdin, Persian military leader, revolts against the Abbasid Caliphate in Azerbaijan (approximate date).

By topic

Religion

• Synod of Aachen: Louis the Pious calls for a council about the regulations (Institutio canonicorum Aquisgranensis) for monastic life in the Frankish Empire.
• Synod of Chelsea: King Coenwulf of Mercia calls for a council about his right to appoint abbots and monasteries in England.
• June 12 – Pope Leo III dies after a 20-year reign, and is succeeded by Pope Stephen IV as the 97th pope of Rome.

Births

• Formosus, pope of the Catholic Church (approximate date)
• Henjō, Japanese waka poet (d. 890)

Deaths

• June 12 – Leo III, pope of the Catholic Church (b. 750)
• October 28 – Beggo, count of Toulouse and Paris
• Cynan Dindaethwy, king of Gwynedd (Wales)
• Fātimah bint Mūsā, Muslim saint (b. 790)
• Harthama ibn A'yan, Muslim governor
• Hildoard, archbishop of Cambrai
• Li He, Chinese poet (b. 790)
• Empress Dowager Wang (Xianzong), Chinese empress
• Wulfar, archbishop of Reims

References

1. Salvador Miranda (1998). The Cardinals of the Holy Roman Church: Pope Stefano IV (815–817).
2. "Ireland's History in Maps (800 AD)". Dennis Walsh. Archived from the original on July 9, 2014. Retrieved on 26 July 2017.
3. Sánchez Albornoz, Claudio; Claudio Sánchez Albornoz. Problems del Reino de Navarra del siglo IX. p. 16.
4. Islam and Europe Timeline (355–1291 AD).
5. "Li He | Center for the Art of Translation | Two Lines Press". Center for the Art of Translation. Retrieved November 5, 2024.

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