4th century in Roman Britain

Events from the 4th century in Roman Britain.

4th century in Roman Britain

Other centuries

3rd century | 4th century | 5th century

Events

• 301
  • Emperor Diocletian fixes the prices of British woollen goods and beer.
• 306
  • 25 July – Emperor Constantius Chlorus dies at Eboracum (York), after campaigning against the Picts. His son Constantine the Great is acclaimed as his successor by the troops here.
• 314
  • The reforms of Diocletian take effect, dividing Britain into four provinces and separating military and civilian government.
  • Establishment of initial Christian hierarchy in Britain.
  • Three British bishops attend the Council of Arles.
• 343
  • January – Emperor Constans visits Britain, and strengthens northern frontier and Saxon Shore.
  • Construction of Pevensey Fort.
• 353
  • Roman Emperor Constantius II punishes British supporters of the recently defeated usurper, Magnentius, and suppresses paganism.
• 355
  • Julian the Apostate placed in charge of Britain and Gaul.
• 359
  • Julian makes Britain main granary for western Roman army.
• 360
  • Picts and Irish attack northern frontier.
• 367
  • The Great Conspiracy: Sustained raids by Picts, Irish, and Saxons. Hadrian's Wall abandoned and military commander Fullofaudes captured or killed.
• 368
  • Count Theodosius arrives in Britain with a military task-force, restores administration under Governor Civilis and commander Dulcitius.
• 369
  • Theodosius defeats invaders, builds new watchtowers from Filey to Huntcliff, re-fortifies northern frontier.
• 382
  • Magnus Maximus defeats the Picts and Scots.
• 383
  • Maximus usurps control of the Empire, taking troops from Britain and abandoning the forts at Chester and the Pennines.
• 397
  • Saint Ninian converts the region around Galloway to Christianity.

See also

• End of Roman rule in Britain
• Sub-Roman Britain
• 5th century in England