| Year | Domestic Events | External Events |
|---|---|---|
| 282 AD | Carus then Numerianus, then Carinus | |
| 284 to 305 AD | Diocletian resided chiefly at Nicomedia in Asia Minor, leaving the west to Maximian. Constantius and Galerius appointed Caesars. Persecution of Christians | Persians defeated, Egyptian and British revolts crushed |
| 307 AD | Six "Augusti" claiming the purple, Constantine of Britain among them | |
| 323 to 337 AD | Constantine the Great (sole emperor). Christianity recognised by the State | |
| 325 AD | Arian conflict, Council of Nicaea | |
| 330 AD | Building of Constantinople | |
| 361 to 363 AD | Julian the Apostate endeavours to revive Paganism | |
| 375 AD | Beginning of the great German folk-wanderings | |
| 379 to 395 AD | Theodosius After Theodosius the division of the Empire becomes permanent | Visigoths received in Maesia if Christians. Massacre of Thessalonica. St. Ambrose of Milan |
| 395 AD | Arcadius rules the East Honorius rules the West |
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| Year | WEST | EAST |
|---|---|---|
| 400 AD | Alaric invades Italy | |
| 404 AD | Imperial residence transferred from Rome to Ravenna | |
| 409 AD | Abandonment of Britain by Rome | |
| 410 AD | Capture and sack of Rome by Alaric | |
| 415 AD | Visigoths found a kingdom at Toulouse | |
| 429 AD | Vandals found a kingdom in Africa | |
| 449 AD | Anglo-Saxons begin to settle Britain | |
| 451 AD | Attila and the Huns defeated by Aetius and the Goths near Chalons | |
| 452 AD | Foundation of Venice | |
| 455 AD | Sack of Rome by the Vandals | |
| 476 AD | Odoacer, barbarian general, deposes the last Western emperor, Romulus Augustulus | |
| 527 AD | Justinian emperor, Victories of Belisarius. Codification of law |
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