WHAT HAPPENED IN 4. CENTURY
Find out what all happened in the 4. century

The Alemanni cross the frozen Rhine River in large numbers, invading the Roman Empire. (2. January 366)

Jin Huidi, Chinese Emperor of the Jin Dynasty, is poisoned and succeeded by his son Jin Huaidi. (8. January 307)

General Siyaj K'ak' conquers Tikal, enlarging the domain of King Spearthrower Owl of Teotihuacán. (16. January 378)

Emperor Theodosius I dies in Milan, the Roman Empire is re-divided into an eastern and a western half. The Eastern Roman Empire is centered in Constantinople under Arcadius, son of Theodosius, and the Western Roman Empire in Mediolanum under Honorius, his brother (aged 10). (17. January 395)

General Magnentius deposes Roman Emperor Constans and proclaims himself Emperor. (18. January 350)

Emperor Gratian elevates Flavius Theodosius at Sirmium to Augustus, and gives him power over all the eastern provinces of the Roman Empire. (19. January 379)

Roman Emperor Theodosius I proclaims his eight-year old son Honorius co-emperor. (23. January 393)

Silvester I begins his reign as Pope of the Catholic Church, succeeding Pope Miltiades. (31. January 314)

Emperor Jovian dies after a reign of eight months. He is found dead in his tent at Tyana (Asia Minor) en route back to Constantinople in suspicious circumstances. (17. February 364)

Emperor Constantius II issues a decree closing all pagan temples in the Roman Empire. (19. February 356)

Athanasius returns to Alexandria. (21. February 362)

Roman Emperor Diocletian orders the destruction of the Christian church in Nicomedia, beginning eight years of Diocletianic Persecution. (23. February 303)

Galerius publishes his edict that begins the persecution of Christians in his portion of the Roman Empire. (24. February 303)

Valentinian I is proclaimed Roman Emperor. (26. February 364)

Edict of Thessalonica: Emperor Theodosius I, with co-emperors Gratian and Valentinian II, declare their wish that all Roman citizens convert to trinitarian Christianity. (27. February 380)

Crispus and Constantine II, sons of Roman Emperor Constantine I, and Licinius Iunior, son of Emperor Licinius, are made Caesares (1. March 317)

Vetranio is asked by Constantina, sister of Constantius II, to proclaim himself Caesar. (1. March 350)

Martyrdom of Saint Adrian of Nicomedia. (4. March 306)

Roman Emperor Julian moves from Antioch with an army of 90,000 to attack the Sassanid Empire, in a campaign which would bring about his own death. (5. March 363)

Emperor Constantine I decrees that the dies Solis Invicti (sun-day) is the day of rest in the Empire. (7. March 321)

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