The Chronology of the Roman Emperors until the Fall of Rome in AD 476
later emperors (for example Constantius) are placed on the chronology on becoming Augusti, not on their being appointed Caesares
Augustus
27 BC- AD14
Tiberius
14-37
Caligula
37-41
Claudius
41-54
Nero
54-68
Galba
68-69
Otho
69
Vitellius
69
Vespasian
69-79
Titus
79-81
Domitian
81-96
Nerva
96-98
Trajan
98-117
Hadrian
117-138
Antoninus Pius
138-161
Marcus Aurelius
161-180
Lucius Verus
161-169
Commodus
180-192
Pertinax
193
Didius Julianus
193
Niger, Albinus, Septimius Severus
Septimius Severus
193-211
Caracalla
211-217
Geta
211
Macrinus
217-218
Elagabalus
218-222
Alexander Severus
222-235
Maximinus Thrax
235-238
Gordian,
Gordian II
238
Pupienus, Balbinus
238
Gordian III
238-244
Phillippus Arabs
244-249
Decius
249-251
Trebonianus Gallus
251-253
Aemilius Aemilianus
253
Valerian
253-260
Gallienus
253-268
Claudius II
268-270
Quintillus
270
Aurelian
270-275
The Gallic Empire
follows death of Valerian
Postumus
260-269
Laelianus
269
Marius
269
Victorinus
269-271
Domitianus
271
Tetricus
271-274
Tacitus
275-276
Florianus
276
Probus
276-282
Carus
282-283
Numerian
283-284
Carinus
283-285
Diocletian
284-286 (splits empire, rules east)
Western Empire
after split by Diocletian
Maximian
286-305
Constantius I
305-306
Severus II
306-307
Constantine
307-337
Maxentius
306-312
Maximian
returned
307-308
Eastern Empire
after split by Diocletian
Diocletian
286-305
Galerius
305-311
Maximinus Daia
310-313
Licinius
308-324
Re-United Empire
reunited by Constantine's defeat of Licinius
