Reign |
Common name |
Personal name & Title
at birth/
on eve of accession |
Imperial name |
Notes |
20 November 284 to 1 May 305 |
Diocletian |
DIOCLES (full name not known)
GAIVS AVRELIVS VALERIVS DIOCLETIANVS IOVIVS |
IMPERATOR CAESAR GAIVS AVRELIVS VALERIVS DIOCLETIANVS PIVS FELIX INVICTVS AVGVSTVS PONTIFEX MAXIMVS, PATER PATRIAE, PROCONSVL |
Co-emperor with Maximian; 285: Germanicus Maximus, Sarmaticus Maximus; 286: Iovius; 287: Germanicus Maximus; 295: Persicus Maximus; 297: Britannicus Maximus, Carpicus Maximus; 298: Armenicus Maximus, Medicus Maximus, Adiabenicus Maximus
Abdicated |
1 May 305 to 25 July 306 |
Constantius I Chlorus |
FLAVIVS VALERIVS CONSTANTIVS
CHLORVS |
IMPERATOR CAESAR GAIVS FLAVIVS VALERIVS CONSTANTIVS AVGVSTVS |
|
1 May 305 to May 311 |
Galerius |
CAIVS GALERIVS VALERIVS MAXIMIANVS |
IMPERATOR CAESAR GALERIVS VALERIVS MAXIMIANVS PIVS FELIX INVICTVS AVGVSTVS |
co-emperor with Severus II |
1 April 286 to 1 May 305 |
Maximian |
MAXIMIANVS (full name not known)
MARCVS AVRELIVS VALERIVS MAXIMIANVS HERCVLIVS
|
IMPERATOR CAESAR GAIVS AVRELIVS VALERIVS MAXIMIANVS PIVS FELIX INVICTVS AVGVSTVS |
co-emperor with Diocletian; 286: Germanicus Maximus, Sarmaticus Maximus; 287: Iovius; 288: Germanicus Maximus; 294: Persicus Maximus; 298: Britannicus Maximus, Carpicus Maximus; 299: Armenicus Maximus, Medicus Maximus, Adiabenicus Maximus;
Forced to abdicate |
August 306 to 16 September 307 |
Severus II |
FLAVIVS VALERIVS SEVERVS |
IMPERATOR SEVERVS PIVS FELIX AVGVSTVS |
co-emperor with Galerius |
307 to 308 |
Maximian |
MAXIMIANVS (full name not known)
MARCVS AVRELIVS VALERIVS MAXIMIANVS HERCVLIVS
|
IMPERATOR CAESAR GAIVS AVRELIVS VALERIVS MAXIMIANVS PIVS FELIX INVICTVS AVGVSTVS PONTIFEX MAXIMVS HERCVLIVS GERMANICVS MAXIMVS SARMATICVS MAXIMVS IOVIVS GERMANICVS MAXIMVS PERSICVS MAXIMVS BRITANNICVS MAXIMVS CARPICVS MAXIMVS ARMENICVS MAXIMVS MEDICVS MAXIMVS ADIABENICVS MAXIMVS |
Abdicated |
28 October 306 to 28 October 312 |
Maxentius |
MARCVS AVRELIVS VALERIVS MAXENTIVS |
MARCVS AVRELIVS VALERIVS MAXENTIVS PIVS FELIX INVICTVS AVGVSTVS |
Drowned on order of Constantine I The Great |
de jure: 307, de facto 312 to 22 May 337 |
Constantine I The Great |
GAIVS FLAVIVS VALERIVS CONSTANTINVS |
IMPERATOR CAESAR FLAVIVS CONSTANTINVS PIVS FELIX INVICTVS AVGVSTVS PONTIFEX MAXIMVS PATER PATRIAE PROCONSVL |
307: Germanicus Maximus; 312: Maximus; 323: Sarmaticus Maximus; 324: Victor substituting Invictus; 328: Gothicus Maximus; 336:Dacicus Maximus |
308 |
Domitius Alexander |
LVCIVS DOMITIVS ALEXANDER |
|
Proclaimed himself emperor |
11 November 308 to 19 December 324 |
Licinius |
VALERIVS LICINIANVS LICINIVS |
IMPERATOR CAESAR GAIVS VALERIVS LICINIVS PIVS FELIX INVICTVS AVGVSTVS |
Co-emperor; abdicated; (executed early 325) |
1 May 310 to July/August 313 |
Maximinus Daia |
DAIA
MAXIMINVS GAIVS GALERIVS VALERIVS |
IMPERATOR CAESAR GALERIVS VALERIVS MAXIMINVS PIUS FELIX AVGVSTVS |
Co-emperor; committed suicide |
337 to 340 |
Constantine II |
FLAVIVS CLAVDIVS CONSTANTINVS |
IMPERATOR CAESAR FLAVIVS VALERIVS CONSTANTINVS AVGVSTVS |
Co-emperor; killed in battle |
337 to 361 |
Constantius II |
FLAVIVS IVLIVS CONSTANTIVS |
IMPERATOR CAESAR FLAVIVS IVLIVS CONSTANTINVS AVGVSTVS |
Co-emperor |
337 to 350 |
Constans I |
FLAVIVS IVLIVS CONSTANS |
IMPERATOR CAESAR FLAVIVS IVLIVS CONSTANS AVGVSTVS |
Co-emperor; killed by Magnentius |
January 350 to 11 August 353 |
Magnentius |
FLAVIVS MAGNVS MAGNENTIVS |
IMPERATOR CAESAR FLAVIVS MAGNVS MAGENTIVS AVGVSTVS |
Co-ruler; committed suicide |
c.350 |
Vetriano |
|
|
Proclaimed himself emperor |
c.350 |
Nepotianus |
|
|
Proclaimed himself emperor |
November 361 to June 363 |
Julian the Apostate |
FLAVIVS CLAVDIVS IVLIANVS |
IMPERATOR CAESAR FLAVIVS CLAVDIVS IVLIANVS AVGVSTVS |
Killed in battle |
363 to 17 February 364 |
Jovian |
FLAVIVS IOVIANVS |
IMPERATOR CAESAR FLAVIVS IOVIANVS AVGVSTVS |
Died accidentally |