Template:Chronological scheme of the Tetrarchy

(See also: Simplified Family tree of Tetrarchs)

Year Western Roman Empire Eastern Roman Empire
Usurpers Caesares Augustus Augustus Caesares Usurpers
286–293 Carausius Maximian Diocletian
293–296 Allectus Constantius I Galerius
297 Domitian III
298 Achilleus
298–305
306 Maxentius
Maximian
Severus II Constantius I Galerius Maximinus II
307 Constantine I Severus II
308–310 Alexander
Maxentius
Maximian
Licinius I
311–312 Maxentius Constantine I Licinius I
Maximinus II
313
313–316 Licinius I
316–317 Crispus Constantine I
Valens I
Licinius II
317–324 Constantine II Constantine I
324 Constantine I
Martinian
Licinius II
Constantius II
324–333 Constantine I
(Sole Roman Emperor)
Constantius II
333–335 Constantine II
Constans I
335–337 Constantine II
Constans I
Dalmatius