The Roman Empire in 337 A.D.
(The empire at the death of Constantine the Great)
- AD 306: Constantine is hailed emperor at Eburacum (York), controls Spain, Gaul, Germany and Britain.
- AD 312: Constantine defeats Maxentius at the Milvian Bridge, gains control of Italy, Raetia and North Africa.
316-317: Constantine conquers the dioceses Pannoniae and Moesia from Licinius.
324: Constantine defeats Licinius and gains entire empire for himself.
- Constantine continued many reforms begun by Diocletian and further split serval provinces into smaller units.