Byzantine general Thomas the Slav leads a revolt, and secures control over most of the Byzantine themes (provinces) in Anatolia. He gets recognition from the Abbasid Caliphate, and concludes a peace treaty with Caliph al-Ma'mun.

What happened and who was notable in 821 AD? Browse important events, world leaders, notable birthdays, and tragic deaths from the year 821 AD.

Benedict of Aniane (Latin: Benedictus Anianensis; German: Benedikt von Aniane; c. 747 – 12 February 821 AD), born Witiza and called the Second Benedict, was a Benedictine monk and monastic reformer who had a substantial impact on the religious practice of …

1821 (MDCCCXXI) was a common year starting on Monday of the Gregorian calendar and a common year starting on Saturday of the Julian calendar, the 1821st year of the Common Era (CE) and Anno Domini (AD) designations, the 821st year of the 2nd millennium, the 21st year of the 19th century, and the 2nd year of the 1820s decade.

What happened in the year 821 in history? Famous historical events that shook and changed the world. Discover events in 821.

This information was collected as part of a lifelong project to create a historical timeline by E. McNally. The rest of the timeline can be found here: https://archive.org/details/emcnallychronology. Unordered events occurring during the year of …

Browse historical events, famous birthdays and notable deaths from Aug 21, 821 AD or search by date, day or keyword.

ARNO, or AQUILA, tenth bishop and first archbishop of Salzburg, was one of those learned churchmen whom Charles the Great gathered round him, and who did so much to frame and strengthen that alliance between the Emperor and the Pope which lay at the basis of the Holy Roman empire of the West.

Feb 27, 2021 · In 821 ad (the first year of emperor Mu Zong's Changqing in Tang Dynasty and the seventh year of Yi Tai in Tubo), envoys from Tang Dynasty and Tubo made an oath in Chang'an, the capital of Tang Dynasty. The next year, they reunited in Lhasa.

Leo’s wife Theodora made a convincing plea to spare Michael’s life on this Holy night. After being secretly freed from prison that night, the conspirators killed Leo in the morning, exiled Theodora, and declared Michael Emperor. He reigned from 820-829 AD.