The Imperial College 284-337

The Imperial College 284 - 337

Date	East		West		Notes
Date	Augustus	Caesar	Augustus	Caesar	Notes
20 November 284	Diocletian becomes Augustus, defeats Carinus in 285				Diocletian appears
21 July 285	Maximian named Caesar				Diocletian finds help
1 April 286	Diocletian		Maximian		Empire divided
1 March 293	Diocletian	Galerius	Maximian	Constantius	Caesars chosen
1 May 305	Galerius	Maximinus (Daia)	Constantius	Severus	Abdication of Diocletian and Maximian
25 July 306	Galerius	Maximinus (Daia)	Severus (Constantine)	Constantine	Constantius dies; Constantine called Augustus by troops, but Caesar by Galerius (senior emperor); accepts latter
28 October 306	Galerius	Maximinus (Daia)	Severus (Constantine) [Maxentius] [Maximian]	Constantine	Maxentius named emperor at Rome; Maximian becomes emperor again
spring 307	Galerius	Maximinus (Daia)	Maximian, Maxentius, Constantine		Severus abdicates, Maximian names Constantine Augustus; arrangement not accepted by Galerius
11 November 308	Galerius, Licinius	Maximinus (Daia)	Maximian, Maxentius, Constantine		Licinius named emperor in East
early 309	Galerius, Licinius Maximinus (Daia)		Maximian, Maxentius, Constantine		*too many emperors! Maximinus and Constantine called filii Augustorum* in East, Constantine called Augustus in West**
July 310	Galerius, Licinius Maximinus (Daia)		Maxentius, Constantine		Maximian commits suicide
310	Galerius, Licinius, Maximinus (Daia)		Maxentius, Constantine		troops name Maximinus Augustus, Constantine called Augustus in the East
April/May 311	Licinius, Maximinus (Daia)		Maxentius, Constantine		Galerius dies
November 312	Licinius, Maximinus (Daia)		Constantine		Constantine defeats Maxentius 28 October 312, named senior emperor by Senate
July 313	Licinius		Constantine		Maximinus dies
winter 316/7	Licinius, Valens		Constantine		Valens Augustus in Dacia, soon deposed
1 March 317	Licinius	Licinius Jr.	Constantine	Crispus, Constantinus	Licinius and Constantine name sons Caesars
summer 324	Licinius, Martianus	Licinius Jr.	Constantine	Crispus, Constantinus	Martianus named Augustus or Caesar by Licinius, deposed by Constantine
19 September 324	Constantine Crispus, Constantinus				Licinius and son abdicate, lose in battle, executed
8 November 324	Constantine Crispus, Constantinus, Constantius				Constantius named Caesar
May 326	Constantine Constantinus, Constantius				Crispus executed
25 December 333	Constantine Constantinus, Constantius, Constans				Constans named Caesar
18 September 335	Constantine Constantinus, Constantius, Constans, Dalmatius				Dalmatius (nephew of Constantine) named Caesar
22 May - 9 September 337	Constantinus, Constantius, Constans				death of Constantine - declaration of sons as Augusti; Dalmatius executed

View a Stemma of These Emperors

Further and detailed treatment of the individuals and the dates may be found in T.D. Barnes, The New Empire of Diocletian and Constantine (Cambridge, Mass., 1982).