View source for 400

{{Use mdy dates|date=February 2011}}
{{Year dab|400}}
{{refimprove|date=October 2017}}
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{{M1 year in topic}}
[[File:East-Hem 400ad.jpg|thumb|The [[Eastern Hemisphere]] in 400]]
[[File:Europa400AD.JPG|thumb|[[Europe]] in 400]]
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Year '''400''' ('''[[Roman numerals|CD]]''') was a [[leap year starting on Sunday]] (link will display the full calendar) of the [[Julian calendar]]. In the [[Roman Empire]], it was known as the '''Year of the Consulship of Stilicho and Aurelianus''' (or, less frequently, '''year 1153 ''[[Ab urbe condita]]'''''). The denomination 400 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 ==
<onlyinclude>
=== By place ===
==== Roman Empire ====
* [[January 9]] – Emperor [[Arcadius]] gives his wife [[Aelia Eudoxia]] the official title of ''[[Augusta (honorific)|Augusta]]''. She is able to wear the purple [[paludamentum]] and is depicted in [[Roman currency]].
* [[Anthemius (praetorian prefect)|Anthemius]], [[Praetorian prefecture of the East|praetorian prefect of the East]], is sent on an [[Diplomatic mission|embassy]] to the [[Sassanid Empire|Persian]] capital, [[Ctesiphon]], to congratulate King [[Yazdegerd I]] on his accession the year before.<ref>{{cite book|first=Christopher|last=Kelly|title=The End of Empire|publisher=W.W. Norton & Company|location=New York|year=2010|isbn=978-0-39333-849-2|page=76}}</ref>
* A riot breaks out in [[Constantinople]]; the [[Great Palace of Constantinople|Great Palace]] is burned to the ground. [[Gainas]], a Gothic leader, attempts to evacuate his soldiers out of the city, but 7,000 armed [[Goths]] are trapped and killed by order of Arcadius. After the [[massacre]], Gainas tries to escape across the [[Dardanelles|Hellespont]], but his rag-tag ''ad hoc'' fleet is destroyed by [[Fravitta]], a Gothic chieftain in imperial service.
* Winter – Gainas leads the remaining Goths back to their homeland across the [[Danube]]. They meet the [[Huns]] and are defeated; the Hunnic chieftain [[Uldin]] sends the head of Gainas to Constantinople, where Arcadius receives it as a [[diplomatic gift]].
==== Europe ====
* The [[Paeonia (kingdom)|Paeonians]] ([[Illyricum (Roman province)|Illyricum]]) lose their identity (approximate date).
==== Asia ====
* [[Emperor Richū|Richū]], the eldest son of [[Emperor Nintoku|Nintoku]], becomes the 17th [[List of Emperors of Japan|Emperor of Japan]].<ref>{{cite book|first=Jonathan Edward|last=Kidder|title=Ancient Japan|publisher=Elsevier-Phaidon|location=Oxford|year=1977|isbn=978-0-72900-047-5|page=146}}</ref>
=== By topic ===
==== Art ====
* Resurrection and [[Empty tomb|"Two Marys with Angel near the Empty Tomb"]], panel of a [[diptych]], found in [[Rome]], is made. It is now kept at [[Castello Sforzesco]], [[Milan]] (approximate date).
==== Literature ====
* The [[Vergilius Vaticanus]], an [[illuminated manuscript]] containing fragments of [[Virgil]]'s ''[[Aeneid]]'' and ''[[Georgics]]'', is made in Rome.
* The ''[[Yoga Sutras of Patanjali]]'' are composed.<ref>{{cite book|last1=Maas|first1=Philipp André|title=Samādhipāda das erste Kapitel des Pātañjalayogaśāstra zum ersten Mal kritisch ediert|trans-title=Samādhipāda critically edited the first chapter of the Pātañjalayogaśāstra for the first time|language=German|date=2004|publisher=Shaker|location=Aachen|isbn=3832249877}}</ref>
==== Medicine ====
* [[Caelius Aurelianus]], Roman [[physician]], is practising his work ''"De morbis acutis et chronicis"'' (''Concerning Acute and Chronic Illness''), a guide to [[acute (medicine)|acute]] and [[chronic (medicine)|chronic]] diseases.
==== Physics ====
* [[Hypatia]], Greek [[Philosophy|philosopher]], distinguishes herself as one of the first female [[scientist]]s, and becoming head of the [[Neoplatonism|Neo-Platonist]] school at [[Alexandria]].
==== Religion ====
* The [[mausoleum]] of [[Galerius]] in [[Thessaloniki|Salonica]] ([[Greece]]) is converted into a [[Christian church|church]].
* [[Bishop]]s from [[Gaza City|Gaza]] ([[Palestine (region)|Palestine]]) arrive at Constantinople to ask Arcadius that he close the [[paganism|pagan]] temple of [[Marnas]].
== Births ==
* [[Aspar]], [[Alans|Alan]] patrician and general (''[[magister militum]]'') (approximate date)
* [[Bahram V]], [[Sasanian Empire|Sasanian]] [[King of Kings]] (''[[shahanshah]]'')
* [[Hassan Yuha'min]], king of the [[Himyarite Kingdom]]
* [[Hydatius]], [[bishop]] of [[Aquae Flaviae]] (modern [[Chaves, Portugal|Chaves]], [[Portugal]]) (approximate date)
* [[Pope Leo I]], [[Pope|Bishop of Rome]]
* [[Qusayy ibn Kilab]], [[Ishmaelites|Ishmaelite]] descendant of [[Abraham]]
* [[Salvian]], [[Christians|Christian]] writer (approximate date)
* [[Sozomen]], Christian Church historian
== Deaths ==
* [[Castor of Karden]], Christian [[priest]] and [[hermit]]
* [[Empress Duan (Huimin)|Duan]], Chinese empress and wife of [[Murong Bao]]
* [[Gainas]], [[Goths|Gothic]] chieftain and general (''magister militum'')
* [[Li Lingrong]], empress and mother of [[Emperor Xiaowu of Jin|Jin Xiaowudi]]
* [[Lü Guang]], emperor of the [[Di (Wu Hu)|Di]] state [[Later Liang (Sixteen Kingdoms)|Later Liang]] (b. [[337]])
* [[Lü Shao]], "Heavenly Prince" (''[[Tian Wang]]'') of Later Liang
* [[Oribasius]], Greek [[Medicine|medical]] writer and [[physician]]
== References ==
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[[Category:400| ]]