__NOTOC__ Year 821 ( DCCCXXI) was a

common year starting on Tuesday A common year starting on Tuesday is any non-leap year (i.e. a year with 365 days) that begins on Tuesday, 1 January, and ends on Tuesday, 31 December. Its dominical letter hence is F. The most recent year of such kind was 2019 and the next one ...

(link will display the full calendar) of the

Julian calendar The Julian calendar, proposed by Roman consul Julius Caesar in 46 BC, was a reform of the Roman calendar. It took effect on , by edict. It was designed with the aid of Greek mathematicians and astronomers such as Sosigenes of Alexandri ...

Events

By place

Byzantine Empire

* Byzantine general

Thomas the Slav Thomas the Slav ( gr, Θωμᾶς ὁ Σλάβος, Thōmas ho Slavos, – October 823) was a 9th-century Byzantine military commander, most notable for leading a wide-scale revolt in 821–23 against Emperor Michael II the Amorian (). A ...

leads a revolt, and secures control over most of the Byzantine

themes Theme or themes may refer to: * Theme (arts), the unifying subject or idea of the type of visual work * Theme (Byzantine district), an administrative district in the Byzantine Empire governed by a Strategos * Theme (computing), a custom graphical ...

(provinces) in

Anatolia Anatolia, tr, Anadolu Yarımadası), and the Anatolian plateau, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the major part of modern-day Turkey. The re ...

. He gets recognition from the

Abbasid Caliphate The Abbasid Caliphate ( or ; ar, الْخِلَافَةُ الْعَبَّاسِيَّة, ') was the third caliphate to succeed the Islamic prophet Muhammad. It was founded by a dynasty descended from Muhammad's uncle, Abbas ibn Abdul-Muttal ...

, and concludes a

peace treaty A peace treaty is an agreement between two or more hostile parties, usually countries or governments, which formally ends a state of war between the parties. It is different from an armistice, which is an agreement to stop hostilities; a surre ...

with Caliph

al-Ma'mun Abu al-Abbas Abdallah ibn Harun al-Rashid ( ar, أبو العباس عبد الله بن هارون الرشيد, Abū al-ʿAbbās ʿAbd Allāh ibn Hārūn ar-Rashīd; 14 September 786 – 9 August 833), better known by his regnal name Al-Ma'm ...

. Thomas crosses with his fleet from

Abydos Abydos may refer to: *Abydos, a progressive metal side project of German singer Andy Kuntz *Abydos (Hellespont), an ancient city in Mysia, Asia Minor * Abydos (''Stargate''), name of a fictional planet in the ''Stargate'' science fiction universe ...

Thrace Thrace (; el, Θράκη, Thráki; bg, Тракия, Trakiya; tr, Trakya) or Thrake is a geographical and historical region in Southeast Europe, now split among Bulgaria, Greece, and Turkey, which is bounded by the Balkan Mountains to ...

, and blockades Emperor

Michael II Michael II ( gr, Μιχαὴλ, , translit=Michaēl; 770–829), called the Amorian ( gr, ὁ ἐξ Ἀμορίου, ho ex Amoríou) and the Stammerer (, ''ho Travlós'' or , ''ho Psellós''), reigned as Byzantine Emperor from 25 December 820 to ...

Constantinople la, Constantinopolis ota, قسطنطينيه , alternate_name = Byzantion (earlier Greek name), Nova Roma ("New Rome"), Miklagard/Miklagarth (Old Norse), Tsargrad ( Slavic), Qustantiniya (Arabic), Basileuousa ("Queen of Cities"), Megalopolis (" ...

; but Thomas' first attack on the capital fails.

Europe

February February is the second month of the year in the Julian and Gregorian calendars. The month has 28 days in common years or 29 in leap years, with the 29th day being called the ''leap day''. It is the first of five months not to have 31 days (th ...

– Duke Borna of Croatia dies after an 11-year reign, as

vassal A vassal or liege subject is a person regarded as having a mutual obligation to a lord or monarch, in the context of the feudal system in medieval Europe. While the subordinate party is called a vassal, the dominant party is called a suzerai ...

of the

Frankish Empire Francia, also called the Kingdom of the Franks ( la, Regnum Francorum), Frankish Kingdom, Frankland or Frankish Empire ( la, Imperium Francorum), was the largest post-Roman barbarian kingdom in Western Europe. It was ruled by the Franks dur ...

. He is succeeded by his nephew,

Vladislav Vladislav ( be, Уладзіслаў (', '); pl, Władysław, ; Russian, Ukrainian, Bulgarian, Macedonian, sh-Cyrl, Владислав) is a male given name of Slavic origin. Variations include ''Volodislav'', ''Vlastislav'' and ''Vlaslav' ...

. Emperor

Louis I Louis I may refer to: * Louis the Pious, Louis I of France, "the Pious" (778–840), king of France and Holy Roman Emperor * Louis I, Landgrave of Thuringia (ruled 1123–1140) * Ludwig I, Count of Württemberg (c. 1098–1158) * Louis I of Blois ...

recognizes him as prince of

Dalmatia Dalmatia (; hr, Dalmacija ; it, Dalmazia; see names in other languages) is one of the four historical regions of Croatia, alongside Croatia proper, Slavonia, and Istria. Dalmatia is a narrow belt of the east shore of the Adriatic Sea, str ...

and Liburnia, at the

Council of Aachen A number of significant councils of the Latin Church were held at Aachen (also known in French as ''Aix-la-Chapelle'') in the early Middle Ages. In the mixed council of 798, Charlemagne proclaimed a capitulary of eighty-one chapters, largely a repe ...

. *

October October is the tenth month of the year in the Julian and Gregorian calendars and the sixth of seven months to have a length of 31 days. The eighth month in the old calendar of Romulus , October retained its name (from Latin and Greek ''ôct ...

–

Lothair I Lothair I or Lothar I ( Dutch and Medieval Latin: ''Lotharius''; German: ''Lothar''; French: ''Lothaire''; Italian: ''Lotario'') (795 – 29 September 855) was emperor (817–855, co-ruling with his father until 840), and the governor of Bava ...

, co-emperor and eldest son of Louis I, marries Ermengarde in

Thionville Thionville (; ; german: Diedenhofen ) is a city in the northeastern French department of Moselle. The city is located on the left bank of the river Moselle, opposite its suburb Yutz. History Thionville was settled as early as the time of th ...

(northeastern

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

). She is the daughter of Count

Hugh of Tours Hugh may refer to: *Hugh (given name) Noblemen and clergy French * Hugh the Great (died 956), Duke of the Franks * Hugh Magnus of France (1007–1025), co-King of France under his father, Robert II * Hugh, Duke of Alsace (died 895), modern-day ...

Britain

* King

Coenwulf of Mercia Coenwulf (; also spelled Cenwulf, Kenulf, or Kenwulph; la, Coenulfus) was the King of Mercia from December 796 until his death in 821. He was a descendant of King Pybba, who ruled Mercia in the early 7th century. He succeeded Ecgfrith, the son ...

dies in

Basingwerk Basingwerk Abbey ( cy, Abaty Dinas Basing) is a Grade I listed ruined abbey near Holywell, Flintshire, Wales. The abbey, which was founded in the 12th century, belonged to the Order of Cistercians. It maintained significant lands in the Engl ...

near Holywell (

Wales Wales ( cy, Cymru ) is a country that is part of the United Kingdom. It is bordered by England to the east, the Irish Sea to the north and west, the Celtic Sea to the south west and the Bristol Channel to the south. It had a population in ...

), while preparing for another assault on

Powys Powys (; ) is a county and preserved county in Wales. It is named after the Kingdom of Powys which was a Welsh successor state, petty kingdom and principality that emerged during the Middle Ages following the end of Roman rule in Britain. Geog ...

, and is buried in

Winchcombe Abbey Winchcombe Abbey is a now-vanished Benedictine abbey in Winchcombe, Gloucestershire; this abbey was once in the heart of Mercia, an Anglo Saxon kingdom at the time of the Heptarchy in England. The Abbey was founded c. 798 for three hundred Benedi ...

. He is briefly succeeded by his son Cynehelm, but he is killed, probably fighting the Welsh, though supposedly through the treachery of his sister

Cwenthryth Cwenthryth (also Quendreda, ang, Cwēnþrȳð) was a princess of Mercia, an Anglo-Saxon kingdom in central England, who lived in the early 9th century. She was the daughter of Coenwulf of Mercia and the sister of Saint Kenelm and also the siste ...

. The

Mercia la, Merciorum regnum , conventional_long_name=Kingdom of Mercia , common_name=Mercia , status=Kingdom , status_text=Independent kingdom (527–879)Client state of Wessex () , life_span=527–918 , era=Heptarchy , event_start= , date_start= , y ...

n throne passes to Coenwulf's brother, Ceolwulf I.

Abbasid Caliphate

* By the time

Al-Ma'mun Abu al-Abbas Abdallah ibn Harun al-Rashid ( ar, أبو العباس عبد الله بن هارون الرشيد, Abū al-ʿAbbās ʿAbd Allāh ibn Hārūn ar-Rashīd; 14 September 786 – 9 August 833), better known by his regnal name Al-Ma'm ...

became caliph, the Arabs and the Byzantines had settled down into border skirmishing, with Arab raids deep into

to capture booty. *

Tahir ibn Husayn Ṭāhir ibn Ḥusayn ( fa, طاهر ابن حسین, ''Tāher ebn-e Hoseyn''; ar, طاهر بن الحسين, ''Tahir bin al-Husayn''), also known as Dhul-Yamīnayn ( ar, ذو اليمينين, "the ambidextrous"), and al-Aʿwar ( ar, الأعو ...

, an

Iranian Iranian may refer to: * Iran, a sovereign state * Iranian peoples, the speakers of the Iranian languages. The term Iranic peoples is also used for this term to distinguish the pan ethnic term from Iranian, used for the people of Iran * Iranian lan ...

general, is appointed as governor of Khurasan, as a reward for supporting the

Abbasid The Abbasid Caliphate ( or ; ar, الْخِلَافَةُ الْعَبَّاسِيَّة, ') was the third caliphate to succeed the Islamic prophet Muhammad. It was founded by a dynasty descended from Muhammad's uncle, Abbas ibn Abdul-Muttalib ...

caliph

in the

Fourth Fitna The Fourth Fitna or Great Abbasid Civil War resulted from the conflict between the brothers al-Amin and al-Ma'mun over the succession to the throne of the Abbasid Caliphate. Their father, Caliph Harun al-Rashid, had named al-Amin as the first suc ...

. * Caliph Al-Ma'mun appointed Nu'aym ibn al-Waddah al-Azdi as the governor of Yemen in 821.

Births

Gao Pian Gao Pian (; 821? – 24 September 887Academia Sinicabr>Chinese-Western Calendar Converter.''Zizhi Tongjian'', vol. 257.), courtesy name Qianli (), formally the Prince of Bohai (), was a Chinese military general, poet, and politician of the Tang ...

, general of the

Tang dynasty The Tang dynasty (, ; zh, t= ), or Tang Empire, was an imperial dynasty of China that ruled from 618 to 907 AD, with an interregnum between 690 and 705. It was preceded by the Sui dynasty and followed by the Five Dynasties and Ten Kingdom ...

(d. 887) * Gisela, Frankish princess, daughter of

Louis the Pious Louis the Pious (german: Ludwig der Fromme; french: Louis le Pieux; 16 April 778 – 20 June 840), also called the Fair, and the Debonaire, was King of the Franks and co-emperor with his father, Charlemagne, from 813. He was also King of Aqui ...

Ibn Abi Asim Abu Bakr Ahmad bin `Amr ad-Dahhak bin Makhlad ash-Shaibani ( ar, أبو بكرأحمد بن عمرو بن الضحاك بن مخلد الشيباني), widely known as Ibn Abi Asim ( ar, ابن أبي عاصم), was an Iraqi people, Iraqi Sunni I ...

, Muslim Sunni scholar (or

822 __NOTOC__ Year 822 ( DCCCXXII) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. Events By place Byzantine Empire * Byzantine general and usurper Thomas the Slav continues his revolt ...

) * Ordoño I, king of

Asturias Asturias (, ; ast, Asturies ), officially the Principality of Asturias ( es, Principado de Asturias; ast, Principáu d'Asturies; Galician-Asturian: ''Principao d'Asturias''), is an autonomous community in northwest Spain. It is coextensiv ...

(approximate date)

Deaths

April 7 Events Pre-1600 * 451 – Attila the Hun captures Metz in France, killing most of its inhabitants and burning the town. * 529 – First ''Corpus Juris Civilis'', a fundamental work in jurisprudence, is issued by Eastern Roman Empe ...

– George the Standard-Bearer, archbishop of

Mytilene Mytilene (; el, Μυτιλήνη, Mytilíni ; tr, Midilli) is the capital of the Greek island of Lesbos, and its port. It is also the capital and administrative center of the North Aegean Region, and hosts the headquarters of the University o ...

(b. c. 776) *

May 2 Events Pre-1600 * 1194 – King Richard I of England gives Portsmouth its first Royal Charter. *1230 – William de Braose is hanged by Prince Llywelyn the Great. * 1536 – Anne Boleyn, Queen of England, is arrested and imprison ...

–

Liu Zong Liú Zǒng () (died May 2, 821), dharma name Dàjué (), formally Duke of Chǔ (), was a general of the Táng Dynasty. He took over control of Lúlóng Circuit (盧龍, headquartered in modern Beijing) in 810 after killing his father Liú Jì () ...

, general of the Tang Dynasty *

December 18 Events Pre-1600 *1271 – Kublai Khan renames his empire "Yuan" (元 yuán), officially marking the start of the Yuan dynasty of Mongolia and China. *1499 – A rebellion breaks out in Alpujarras in response to the forced conversions ...

– Theodulf, bishop of

Orléans Orléans (;"Orleans"
(US) and Arno The Arno is a river in the Tuscany region of Italy. It is the most important river of central Italy after the Tiber. Source and route The river originates on Monte Falterona in the Casentino area of the Apennines, and initially takes a ...

, archbishop of

Salzburg Salzburg (, ; literally "Salt-Castle"; bar, Soizbuag, label= Austro-Bavarian) is the fourth-largest city in Austria. In 2020, it had a population of 156,872. The town is on the site of the Roman settlement of ''Iuvavum''. Salzburg was founded ...

Artrí mac Cathail Artrí mac Cathail (died 821) was a King of Munster from the Glendamnach branch of the Eóganachta. He was the son of Cathal mac Finguine (died 742), a previous king. He reigned from 793 to 820. The kingship of Munster had rotated among the inner ...

, king of Munster (Ireland) *

Benedict of Aniane Benedict of Aniane ( la, Benedictus Anianensis; german: Benedikt von Aniane; 747 – 12 February 821 AD), born Witiza and called the Second Benedict, was a Benedictine monk and monastic reformer, who left a large imprint on the religious prac ...

, Frankish

monk A monk (, from el, μοναχός, ''monachos'', "single, solitary" via Latin ) is a person who practices religious asceticism by monastic living, either alone or with any number of other monks. A monk may be a person who decides to dedica ...

* Borna, duke ('' knez'') of

Croatia , image_flag = Flag of Croatia.svg , image_coat = Coat of arms of Croatia.svg , anthem = "Lijepa naša domovino"("Our Beautiful Homeland") , image_map = , map_caption = , capit ...

* Coenwulf, king of

Egbert Egbert is a name that derives from old Germanic words meaning "bright edge", such as that of a blade. Anglo-Saxon variant spellings include Ecgberht () and Ecgbert. German variant spellings include Ekbert and Ecbert. People with the first name Mid ...

, bishop of Lindisfarne * Guisclafred, Frankish nobleman (approximate date) * Li Su, general of the Tang dynasty (b. 773) *

Tian Hongzheng Tian Hongzheng () (764 – August 29, 821), né Tian Xing (), courtesy name Andao (), formally Duke Zhongmin of Yi (), was a Chinese military general and politician of the Tang Dynasty. Under his governance, Weibo Circuit (魏博, headquartered i ...

, general of the Tang dynasty (b.

764 __NOTOC__ Year 764 ( DCCLXIV) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar. The denomination 764 for this year has been used since the early medieval period, when the Anno Domini calendar era b ...

) *

Wei Guanzhi Wei Guanzhi (韋貫之) (760 – November 13, 821), né Wei Chun (韋純), courtesy name Guanzhi (貫之) or Zhengli (正理), was a Chinese politician and writer. He served as a chancellor during the reign of Emperor Xianzong. Background Wei Ch ...

, chancellor of the Tang dynasty (b.

760 __NOTOC__ Year 760 ( DCCLX) was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar. The denomination 760 for this year has been used since the early medieval period, when the Anno Domini calendar era b ...

) * Zheng Yuqing, chancellor of the Tang dynasty (b.

746 Year 746 ( DCCXLVI) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. The denomination 746 for this year has been used since the early medieval period, when the Anno Domini calendar era became t ...

)

References

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