285 - 305 ad
Diocletian reorganized the administration of the Empire, breaking
the provinces into smaller units grouped into twelve dioceses. Governors
military authority, military commands became independent of provincial boundaries,
the Senate lost most of its privileges, and Italy became subject to full
measures included monetary reform and a price fixing edict. The
Tetrarchy is also remembered
for severe persecutions of Christians [303- 313].
C. Aurelius Verus
Augustus 285 - 305
Diocletian [b. ca. 245] became emperor after the death of Carinus. He
reformed the empire, transforming the Principate into the Dominate, before his death in
311 at his palace at Spalato.
Galerius Valerius Maximianus
[b. ca. 260] became Caesar in the East in 293, and Augustus when Diocletian retired in 305. He died of
cancer in 311.
M. Aurelius Valerius Maximianus
Caesar 285-286, Augustus 286-305, 306-308, 310
Maximian [b. ca. 250] was
first Caesar in the West, then
junior Augustus in 286. He reluctantly retired in 305, returning when his son Maxentius
took power, and later (briefly) in 310.
Flavius Valerius Constantius
Constantius [b. ca. 250] recovered
Britain for the empire as Caesar in the West.
Soon after his elevation to Augustus, he died in 306.