4th Century
| Year | Date | Event |
|---|---|---|
| 303 | Emperor Diocletian orders the persecution of Christians. | |
| 305 | Diocletian and Maximian abdicated. Constantius and Galerius becomes Augusti. Maximinus is appointed Caesar in the east and Severus in the west. Partition of the Roman Empire. Multiplication of Emperors. | |
| 318 | Excommunication of Arius. | |
| 325 | The Ecumenical Council of Nicaea. | |
| 366 | Damasus, son of Antonius and Laurentia, born in the Conventus Bracarensis of Gallaecia (near the modern city of Guimarães), is the reigning Pope under the name Damasus I. (to 383) | |
| 385 | Paulus Orosius, historian, theologian and disciple of St. Augustine, is probably born in Braga. | |
| 388 | Paternus becomes bishop of the Episcopal see of Braga. |
Read more about this topic: Timeline Of Portuguese History