SECOND TETRARCHY:
Constantius I (Augustus) (305–306) Galerius (Augustus) (305–306)
Severus II (Caesar) (305–306) Maximin (Caesar) (305–306)
THIRD TETRARCHY:
Severus II (Augustus) (306–307) Galerius (Augustus) (306–307)
Constantine I (Caesar) (306–307) Maximin (Caesar) (306–307)
FOURTH TETRARCHY:
Licinius (Augustus) (308–311) Galerius (Augustus) (308–311)
Constantine I (Caesar) (308–311) Maximin (Caesar) (308–311)
Maxentius (in Italy) (306–312)
Constantine I (Augustus) (311–337), Licinius (Augustus) (311–324), Maximin
(Augustus) (311–313)
Constantine I and Licinius (313–324)
Constantine I (324–337)
Constantine II (Augustus) (337–340), Constans (Augustus) (337–350),
Constantius II (Augustus) (337–361)
Constans (340–350) Constantius II (340–361)
Constantius II (350–361)
Magnentius (350–353)
Julian (361–363)
Jovian (363–364)
Valentinian I (364–375) Valens (364–378)
Gratian (367–383) Theodosius I (379–395)
Valentinian II (375–392)
Magnus Maximus (383–388) and Flavius Victor (384–388)
Eugenius (392–394)
Theodosius I (394–395)
Honorius I (395–423) Arcadius (395–408)
