AD 21 ( XXI) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of

Tiberius Tiberius Julius Caesar Augustus (; 16 November 42 BC – 16 March AD 37) was the second Roman emperor. He reigned from AD 14 until 37, succeeding his stepfather, the first Roman emperor Augustus. Tiberius was born in Rome in 42 BC. His father ...

and Drusus (or, less frequently, year 774 '' Ab urbe condita''). The denomination AD 21 for this year has been used since the early medieval period, when the

Anno Domini The terms (AD) and before Christ (BC) are used to label or number years in the Julian and Gregorian calendars. The term is Medieval Latin and means 'in the year of the Lord', but is often presented using "our Lord" instead of "the Lord", ...

calendar era A calendar era is the period of time elapsed since one '' epoch'' of a calendar and, if it exists, before the next one. For example, it is the year as per the Gregorian calendar, which numbers its years in the Western Christian era (the Copti ...

became the prevalent method in Europe for naming years.

Events

By place

Roman Empire

* The

Aedui The Aedui or Haedui (Gaulish: *''Aiduoi'', 'the Ardent'; grc, Aἴδουοι) were a Gallic tribe dwelling in the modern Burgundy region during the Iron Age and the Roman period. The Aedui had an ambiguous relationship with the Roman Republic a ...

revolt under Julius Florus and

Julius Sacrovir Julius Sacrovir was a member of the gens Julia. Alongside Julius Florus, a leader of the Treveri, he led the Aedui tribe in Gaul in a revolt against the Romans. After being defeated in battle Sacrovir fled to, and was killed in Augustodunum. Gal ...

; the revolt is suppressed by

Gaius Silius Gaius Silius (died AD 24) was a Roman senator who achieved successes as a general over German barbarians following the disaster of the Battle of the Teutoburg Forest. For this achievement he was appointed consul in AD 13 with Lucius Munatius Pla ...

. * Emperor Tiberius is a

Roman Consul A consul held the highest elected political office of the Roman Republic ( to 27 BC), and ancient Romans considered the consulship the second-highest level of the ''cursus honorum'' (an ascending sequence of public offices to which politic ...

for the fourth time. * The Romans create a

buffer state A buffer state is a country geographically lying between two rival or potentially hostile great powers. Its existence can sometimes be thought to prevent conflict between them. A buffer state is sometimes a mutually agreed upon area lying between ...

in the territory of the Quadi, in southern

Slovakia Slovakia (; sk, Slovensko ), officially the Slovak Republic ( sk, Slovenská republika, links=no ), is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to the s ...

. * Barracks are constructed for the

Praetorian Guard The Praetorian Guard (Latin: ''cohortēs praetōriae'') was a unit of the Imperial Roman army that served as personal bodyguards and intelligence agents for the Roman emperors. During the Roman Republic, the Praetorian Guard were an escort fo ...

, on the Quirinal (located on the

Seven Hills of Rome The seven hills of Rome ( la, Septem colles/montes Romae, it, Sette colli di Roma ) east of the river Tiber form the geographical heart of Rome, within the walls of the city. Hills The seven hills are: * Aventine Hill (Latin: ''Collis Aventi ...

Korea

* King Daeso of Dongbuyeo is killed in battle against the armies of

Goguryeo Goguryeo (37 BC–668 AD) ( ) also called Goryeo (), was a Korean kingdom located in the northern and central parts of the Korean Peninsula and the southern and central parts of Northeast China. At its peak of power, Goguryeo controlled mos ...

, led by its third ruler, King Daemusin.

By topic

Art and Science

* The manufacture of

pen A pen is a common writing instrument that applies ink to a surface, usually paper, for writing or drawing. Early pens such as reed pens, quill pens, dip pens and ruling pens held a small amount of ink on a nib or in a small void or cavity wh ...

s and metal writing tools begins in

Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...

(approximate date).

Births

Deaths

* Arminius, Germanic military leader (b. 18/

17 BC __NOTOC__ Year 17 BC was either a common year starting on Sunday or Monday or a leap year starting on Saturday, Sunday or Monday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further i ...

) *

Clutorius Priscus Clutorius Priscus (c. 20 BC – AD 21) was a Roman poet. Priscus was paid an honorarium by the Roman Emperor Tiberius to produce a panegyric for his nephew and adopted son Germanicus upon his death in AD 19. Two years later, Tiberius' son D ...

, Roman poet (b. c.

20 BC __NOTOC__ Year 20 BC was either a common year starting on Wednesday or Thursday or a leap year starting on Tuesday, Wednesday or Thursday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for ...

) * Daeso of Dongbuyeo, Korean king (b.

60 BC __NOTOC__ Year 60 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Metellus Celer and Afranius (or, less frequently, year 694 ''Ab urbe condita''). The denomination 60 BC for this year h ...

) *

Marcus Valerius Messalla Barbatus Valeria Messalina (; ) was the third wife of Roman emperor Claudius. She was a paternal cousin of Emperor Nero, a second cousin of Emperor Caligula, and a great-grandniece of Emperor Augustus. A powerful and influential woman with a reputation ...

, Roman consul (b. 11 BC) *

Publius Sulpicius Quirinius Publius Sulpicius Quirinius (c. 51 BC – AD 21), also translated as Cyrenius, was a Roman Empire, Roman Aristocracy (class), aristocrat. After the banishment of the ethnarch Herod Archelaus from the Tetrarchy (Judea), tetrarchy of Judea in AD 6, ...

, Roman governor (b. c.

51 BC __NOTOC__ Year 51 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Marcellus and Sulpicius (or, less frequently, year 703 ''Ab urbe condita''). The denomination 51 BC for this year has be ...

) *

Wang Wang may refer to: Names * Wang (surname) (王), a common Chinese surname * Wāng (汪), a less common Chinese surname * Titles in Chinese nobility * A title in Korean nobility * A title in Mongolian nobility Places * Wang River in Thai ...

(or Xiaomu), Chinese empress of the

Xin Dynasty The Xin dynasty (; ), also known as Xin Mang () in Chinese historiography, was a short-lived Chinese imperial dynasty which lasted from 9 to 23 AD, established by the Han dynasty consort kin Wang Mang, who usurped the throne of the Emperor Pin ...

References

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