Editing AD 21

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'''AD 21''' ('''[[Roman numerals|XXI]]''') was a [[common year starting on Wednesday]] of the Julian calendar. At the time, it was known as the '''Year of the Consulship of [[Tiberius]] and [[Drusus Julius Caesar|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]] [[calendar era]] became the prevalent method in Europe for naming years.

== Events ==

=== By place ===

==== Roman Empire ====
* The [[Aedui]] revolt under Julius Florus and [[Julius Sacrovir]]; the revolt is suppressed by [[Gaius Silius]].<ref>{{cite web |last1=Jasiński |first1=Jakub |last2=Bak |first2=Marcin |title=Rebellion of Florus and Sacrovir in Gaul (21 CE) « IMPERIUM ROMANUM |url=https://imperiumromanum.pl/en/wars/rebellion-of-florus-and-sacrovir-in-gaul/ |access-date=18 September 2022}}</ref>
* Emperor Tiberius is a [[List of Early Imperial Roman Consuls|Roman Consul]] for the fourth time.

* The Romans create a [[buffer state]] in the territory of the [[Quadi]], in southern [[Slovakia]].
* Barracks are constructed for the [[Praetorian Guard]], on the [[Quirinal Hill|Quirinal]] (located on the [[Seven Hills of Rome]]).

==== Korea ====
* King [[Daeso|Daeso of Dongbuyeo]] is killed in battle against the armies of [[Goguryeo]], led by its third ruler, King [[Daemusin of Goguryeo|Daemusin]].

=== By topic ===

==== Art and science ====
* The manufacture of [[pen]]s and metal writing tools begins in [[Ancient Rome|Rome]] (approximate date).
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== Births ==

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== Deaths ==
* [[Arminius]], Germanic military leader (b. [[18 BC|18]]/[[17 BC]])<ref>{{cite web |last1=Tacitus |first1=Publius |title=The Annals 2.88 |url=https://en.wikisource.org/wiki/The_Annals_(Tacitus)/Book_2#88 |access-date=18 September 2022}}</ref>
* [[Clutorius Priscus]], Roman poet (b. c. [[20 BC]])
* [[Daeso|Daeso of Dongbuyeo]], Korean king (b. [[60 BC]])
* [[Marcus Valerius Messalla Barbatus]], Roman consul (b. [[11 BC]])
* [[Quirinius|Publius Sulpicius Quirinius]], Roman governor (b. c. [[51 BC]]) 
* [[Empress Wang (Xin Dynasty)|Wang]] (or Xiaomu), Chinese empress of the [[Xin dynasty|Xin Dynasty]]

== References ==
{{Reflist}}

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[[Category:21|0021]]

[[als:20er#21]]
[[Category:1st millennium]]
[[Category:1st century-related lists]]