The 4th century: key events

Chronyas has 653 events dated to the 4th century (301 to 400 CE), during the Ancient civilizations. Below are the most notable ones, in date order.

Most of the events in this century belong to Wars, politics & history and Civilizations & archaeology.

Open this century on the timeline

c. 301 CEOrigins of San Marino
303 CEConstruction of Etchmiadzin Cathedral
23 February 303 CEThe Great Persecution of Christians begins
from 24 February 303 CE to 1 January 313 CEDiocletianic Persecution
from 304 CE to 439 CEWu Hu luan hua
from 304 CE to 439 CESixteen Kingdoms
from 1 May 305 CE to 25 July 306 CEConstantius Chlorus becomes Roman emperor
from 1 May 305 CE to 1 May 311 CEGalerius becomes Roman emperor
306 CESynod of Elvira
from 25 July 306 CE to 22 May 337 CEConstantine the Great becomes Roman emperor
from 28 October 306 CE to 28 October 312 CEMaxentius becomes Roman emperor
from 308 CE to 309 CEMarcellus I becomes Pope
from 11 November 308 CE to 18 September 324 CELicinius becomes Roman emperor
from 309 CE to 379 CEShapur II becomes Emperor of the Sasanian Empire
309 CEOrigins of Temple of Romulus
from 18 April 309 CE to 17 August 309 CEEusebius becomes Pope
c. 310 CEEruption of Witori
from 2 July 311 CE to 10 January 314 CEMiltiades becomes Pope
312 CEOrigins of Basilica of Maxentius
28 October 312 CEBattle of the Milvian Bridge
June 313 CEEdict of Milan
from 31 January 314 CE to 31 December 335 CESylvester I becomes Pope
25 July 315 CEConstruction of Arch of Constantine
from 320 CE to 550 CEGupta Empire
325 CEFirst Council of Nicaea
327 CEConstruction of Church of the Nativity
from 330 CE to 555 CERouran Khaganate
from c. 330 CE to 1922Origins of Constantinople
c. 330 CEKing Ezana converts Aksum to Christianity
11 May 330 CEConstantine dedicates Constantinople
17 November 331 CEBirth of Julian
335 CEConstruction of Church of the Holy Sepulchre
from 19 January 336 CE to 7 October 336 CEMark becomes Pope
from 7 February 337 CE to 12 April 352 CEJulius I becomes Pope
from 22 May 337 CE to 3 November 361 CEConstantius II becomes Roman emperor
from 22 May 337 CE to 1 January 340 CEConstantine II becomes Roman emperor
22 May 337 CEDeath of Constantine the Great
339 CEBirth of Ambrose
c. 340 CEEruption of Akutan
341 CEEarthquake in Antakya (Antioch); Cyprus (Salamis), Turkey
344 CEBattle of Singara
345 CEBirth of Jerome
11 January 347 CEBirth of Theodosius I
349 CEBirth of John Chrysostom
from 350 CE to 1000Western Ganga dynasty
from 17 May 352 CE to 24 September 366 CELiberius becomes Pope
13 November 354 CEBirth of Augustine of Hippo
360 CEBirth of Hypatia
from February 360 CE to June 363 CEJulian becomes Roman emperor
from March 363 CE to July 363 CEJulian's Persian expedition
June 363 CEDriving car
from 26 June 363 CE to 17 February 364 CEJovian becomes Roman emperor
from 28 June 363 CE to 17 February 364 CEJovian becomes Byzantine emperor
from 26 February 364 CE to 17 November 375 CEValentinian I becomes Roman emperor
from 28 March 364 CE to 9 August 378 CEValens becomes Roman emperor
21 July 365 CE365 Crete earthquake
from 1 October 366 CE to 11 December 384 CEDamasus I becomes Pope
from 4 August 367 CE to 25 August 383 CEGratian becomes Roman emperor
11 October 367 CEEarthquake in Iznik,Nicaea, Turkey
371 CEBattle of Bagavan
from 375 CE to 568 CEMigration Period
from 376 CE to 382 CEGothic War of 376–382
9 August 378 CEBattle of Adrianople
9 August 378 CEThe Goths destroy a Roman army at Adrianople
from 19 January 379 CE to 17 January 395 CETheodosius I becomes Roman emperor
27 February 380 CEChristianity becomes the state religion of Rome
381 CEFirst Council of Constantinople
from December 384 CE to November 399 CESiricius becomes Pope
386 CEOrigins of Sümela Monastery
386 CEConstruction of Basilica of Saint Paul outside the Walls
from 386 CE to 535 CENorthern Wei
from 23 January 393 CE to 15 August 423 CEHonorius becomes Western Roman emperor
from 5 September 394 CE to 6 September 394 CEBattle of the Frigidus
from 395 CE to 410 CEAlaric I becomes King of Wisigoths
from 17 January 395 CE to 1 May 408 CEArcadius becomes Byzantine emperor
17 January 395 CEThe Roman Empire is permanently divided
399 CEThe monk Faxian sets out for India
from 27 November 399 CE to 19 December 401 CEAnastasius I becomes Pope
from 400 CE to 700 CEMigration Period Pessimum
c. 400 CEBirth of Leo I

All eras, topics and centuries