WHAT HAPPENED IN THE FIRST HALF OF THE 4. CENTURY
Find out what all happened in the first half of the 4. century

The Roman usurper Nepotianus, of the Constantinian dynasty, proclaims himself Roman Emperor, entering Rome at the head of a group of gladiators. (3. June 350)

Alexander the Great dies in the palace of Nebuchadnezzar II in Babylon (11. June 323. BC)

The Edict of Milan, signed by Constantine the Great and co-emperor Valerius Licinius granting religious freedom throughout the Roman Empire, is posted in Nicomedia. (13. June 313)

Roman usurper Nepotianus, of the Constantinian dynasty, is defeated and killed by troops of the usurper Magnentius, in Rome. (30. June 350)

Battle of Adrianople: Constantine I defeats Licinius, who flees to Byzantium. (3. July 324)

The official opening of the Constantine's Bridge built over the Danube between Sucidava (Corabia, Romania) and Oescus (Gigen, Bulgaria) by the Roman architect Theophilus Patricius (5. July 328)

Constantine I is proclaimed Roman emperor by his troops. (25. July 306)

The Arch of Constantine is completed near the Colosseum in Rome to commemorate Constantine I's victory over Maxentius at the Milvian Bridge. (25. July 315)

A Macedonian army led by Philip II defeated the combined forces of Athens and Thebes in the Battle of Chaeronea, securing Macedonian hegemony in Greece and the Aegean. (2. August 338. BC)

Battle of Crannon between Athens and Macedon. (7. August 322. BC)

Pope Eusebius is banished by the Emperor Maxentius to Sicily, where he dies, perhaps from a hunger strike. (17. August 310)

San Marino, one of the smallest nations in the world and the world's oldest republic still in existence, is founded by Saint Marinus. (3. September 301)

Constantine II, Constantius II, and Constans I succeed their father Constantine I as co-emperors. The Roman Empire is divided between the three Augusti. (9. September 337)

Emperor Constantine the Great consecrated the Church of the Holy Sepulchre in Jerusalem. (13. September 335)

Emperor Severus II is captured and imprisoned at Tres Tabernae. He is later executed (or forced to commit suicide) after Galerius unsuccessfully invades Italy. (16. September 307)

Constantine the Great decisively defeats Licinius in the Battle of Chrysopolis, establishing Constantine's sole control over the Roman Empire. (18. September 324)

Flavius Dalmatius is raised to the rank of Caesar by his uncle, emperor Constantine I. (19. September 335)

Alexander the Great defeats Darius III of Persia in the Battle of Gaugamela. (1. October 331. BC)

Roman Emperor Licinius is defeated by his colleague Constantine I at the Battle of Cibalae, and loses his European territories. (8. October 314)

Pappus of Alexandria, Greek philosopher, observes an eclipse of the sun and writes a commentary on The Great Astronomer (Almagest). (18. October 320)

   
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