4th century

==Events==
{{See also|Christianity in the 4th century}}
[[File:Musei Capitolini-testa bronzea di Costantino-antmoose.jpg|thumb|200px|Contemporary [[bronze]] [[portrait|head]] of [[Constantine I (emperor)|Constantine I]] (r. 306–337 AD)]]
* Early 4th century – Former audience hall now known as the Basilica, [[Trier]], Germany, is built.
* Early 4th century – The [[Gupta Empire]] is established.
* [[301]]: [[Kingdom of Armenia (antiquity)|Armenia]] first to adopt [[Christianity]] as [[state religion]].
* [[304]]–[[439]]: The [[Sixteen Kingdoms]] in China begins.
* [[306]]–[[337]]: [[Constantine the Great]], ends persecution of Christians in the [[Roman Empire]] (see also [[Constantinian shift]]) and [[Constantinople]] becomes new seat of government ([[New Rome]]).
[[File:Flickr - archer10 (Dennis) - Guatemala-1619.jpg|thumbnail|[[Tikal]] had a population of about 100,000 when it was conquered by [[Teotihuacan]], less than a fourth of its peak population<ref>{{cite magazine|url=http://ngm.nationalgeographic.com/print/2007/08/maya-rise-fall/gugliotta-text|archive-url=https://web.archive.org/web/20080409150315/http://ngm.nationalgeographic.com/print/2007/08/maya-rise-fall/gugliotta-text|url-status=dead|archive-date=April 9, 2008|title=The Maya: Glory and Ruin | magazine=National Geographic Magazine}}</ref>|200x200px]]
* [[320]]: Butuan Boat One, the oldest known [[Balangay]], a multi-purpose ship native to the [[Philippines]] is built. 
* [[325]]–[[328]]: The [[Kingdom of Aksum]] adopts Christianity.
* 325: Constantine the Great calls the [[First Council of Nicaea]] to pacify Christianity in the grip of the [[Arian controversy]].
* [[335]]–[[380]]: [[Samudragupta]] expands the [[Gupta Empire]].
* [[337]]: Constantine the Great is baptized on his death bed.
* [[350]]: About this time the Kingdom of Aksum conquers the [[Kingdom of Kush]].
* 350–400: At some time during this period, the [[Huns]] began to attack the [[Sassanid Empire]].<ref name=":1">Roberts,  J: "History of the World". Penguin, 1994.</ref>
* [[350]]: The [[Kutai #Kutai Kingdoms|Kutai Martadipura]] kingdom in [[East Kalimantan|eastern Borneo]] produced the earliest known [[Sanskrit inscriptions in the Malay world|stone inscriptions]] in [[Indonesia]] known as the [[Yūpa #Yūpa inscription in Indonesia|Mulavarman inscription]] written in the [[Sanskrit]] language using [[Pallava script|Pallava]] scripture.<ref>{{cite web|url=http://epress.anu.edu.au/austronesians/austronesians/mobile_devices/ch15s02.html|title=The Austronesians: Historical and Comparative Perspectives|publisher=ANU Press|access-date=2013-04-29|archive-url=https://web.archive.org/web/20131225113933/http://epress.anu.edu.au/austronesians/austronesians/mobile_devices/ch15s02.html|archive-date=2013-12-25|url-status=dead}}</ref> 
* Mid-4th century – Dish, from [[Mildenhall Treasure|Mildenhall]], England, is made. It is now kept at the [[British Museum]], London.
* Mid-4th century – [[Wang Xizhi]] makes a portion of a letter from the ''Feng Ju'' album. [[Six Dynasties]] period. It is now kept at [[National Palace Museum]], [[Taipei]], [[Taiwan]], [[Republic of China]].
*[[AD 365|365]]: An [[365 Crete earthquake|earthquake]] with a [[Moment magnitude scale|magnitude]] of at least eight strikes the Eastern [[Mediterranean]]. The following tsunami causes widespread destruction in Crete, Greece, Libya, Egypt, Cyprus, and Sicily.
* [[376]]: [[Visigoths]] appear on the [[Danube]] and are allowed entry into the Roman Empire in their flight from the [[Huns]].
* [[378]]: [[Battle of Adrianople]]: Roman army is defeated by the Visigoth cavalry. Emperor [[Valens]] is killed.
* [[378]]–[[395]]: [[Theodosius I]], Roman emperor, bans [[Paganism|pagan]] worship, Christianity is made the official religion of the Empire.
* [[378]]: [[Siyaj K'ak']] conquers [[El Perú (Maya site)|Waka]] on ([[January 8]]), [[Tikal]] ([[January 16]]) and [[Uaxactun]].[[File:Council of Constantinople 381-stavropoleos church.jpg|thumb|200x200px|Wall painting of the Council of Constantinople (381) in the [[Stavropoleos Monastery|Stavropoleos monastery]], Romania]]
* [[381]]: [[First Council of Constantinople]] reaffirms the Christian doctrine of the [[Trinity]] by adding to the [[Nicene Creed|creed of Nicaea]].
* [[AD 383|383]]: [[Battle of Fei River]] in China.
* [[395]]: The [[Battle of Canhe Slope]] occurs.
* 395: [[Roman emperor]] [[Theodosius I]] dies, causing the Roman Empire to split permanently.
* Late 4th century: Cubiculum of Leonis, [[Catacomb of Commodilla]], near Rome, is made.
* Late 4th century: Atrium added in the [[Old St. Peter's Basilica]], Rome.