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

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

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

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

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)

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)

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

Emperor Jin Huidi is executed by Liu Cong, ruler of the Xiongnu state (Han Zhao). (14. March 313)

After divorcing his wife Minervina, Constantine marries Fausta, the daughter of the retired Roman Emperor Maximian. (31. March 307)

Crown Prince Jin Chengdi, age 4, succeeds his father Jin Mingdi as emperor of the Eastern Jin Dynasty. (1. April 325)

The Diocletianic Persecution of Christians in the Roman Empire ends. (30. April 311)

Battle of Tzirallum: Emperor Licinius defeats Maximinus II and unifies the Eastern Roman Empire. (30. April 313)

Diocletian and Maximian retire from the office of Roman Emperor. (1. May 305)

Byzantium is renamed Nova Roma during a dedication ceremony, but it is more popularly referred to as Constantinople. (11. May 330)

Roman Emperor Diocletian orders the beheading of the 14-year-old Pancras of Rome. (12. May 304)

Constantine the Great announced free distributions of food to the citizens in Constantinople. (18. May 332)

The First Council of Nicea – the first Ecumenical Council of the Christian Church is held. (20. May 325)

The Macedonian army of Alexander the Great defeats Darius III of Persia in the Battle of the Granicus. (22. May 334. BC)