| PRINCIPATE PERIOD (27-00-284) |
| Early Roman Empire (27-00-193) |
| 27-00-68 Julio-Claudian Dynasty |
| 27-00-14 [01] Augustus |
| …14-37 [02] Tiberius |
| ..37-41 [03] Caligula |
| ..41-54 [04] Claudius-I |
| ..54-68 [05] Nero |
| 69 Year of the Four Emperors |
| ..68-69 [06] Galba (u) |
| …69 [07] Otho (u) |
| …69 [08] Vitellius (u) |
| 69-96 Flavian Dynasty |
| .69-79 [09] Vespasian (u) |
| .79-81 [10] Titus |
| .81-96 [11] Domitian |
| 096-192 Nervan-Antonine Dynasty |
| 096-098 [12] Nerva |
| 098-117 [13] Trajan |
| 117-138 [14] Hadrian |
| 138-161 [15] Antoninus Pius |
| 161-169 [16] *Lucius Verus |
| 161-180 [17] *Marcus Aurelius |
| 177-192 [18] *Commodus |
| 193 Year of the Five Emperors |
| 192-193 [19] Pertinax (u) |
| …193 [20] Didius Julianus (u) |
| Middle Roman Empire (193-284) |
| 193-217 Severan Dynasty |
| 193-211 [21] *Septimius Severus (u) |
| 198-217 [22] *Caracalla |
| 209-211 [23] *Geta |
| 217-218 Non-Dynastic |
| 217-218 [24] *Macrinus (u) |
| …218 [25] *Diadumenian |
| 218-235 Severan Dynasty Restored |
| 218-222 [26] Elagabalus |
| 222-235 [27] Severus Alexander |
| 235-284 Military Anarchy |
| 235-238 [28] *Maximinus-I Thrax (u) |
| …238 [29] *Gordian-I (u) |
| …238 [30] *Gordian II (u) |
| …238 [31] *Balbinus (u) |
| …238 [32] *Pupienus (u) |
| 238-244 [33] Gordian III |
| 244-249 [34] *Philip-I the Arab |
| 247-249 [35] *Philip II |
| 249-251 [36] *Decius |
| …251 [37] *Herennius Etruscus |
| …251 [38] *Hostilian |
| 251-253 [39] *Trebonianus Gallus |
| 251-253 [40] *Volusianus |
| …253 [41] Aemilianus |
| 253-260 [42] *Valerian |
| 253-268 [43] *Gallienus |
| …260 [44] Saloninus |
| 268-270 [45] Claudius II |
| 270-275 [46] Aurelian |
| 275-276 [47] Tacitus |
| …276 [48] Florianus |
| 276-282 [49] Probus |
| 282-283 [50] Carus |
| 283-284 [51] *Numerian |
| 283-285 [52] *Carinus |
| DOMINATE PERIOD (284-476) |
| Late Roman Empire (284-476) |
| 293-305 Diocletian Tetrarchy |
| 284-305 [53] *Diocletian (all→E) |
| 286-305 [54] *Maximian (W) |
| 305-364 Constantinian Dynasty |
| 305-306 [55] *Constantius-I Chlorus (W, augustus) |
| 305-311 [56] *Galerius (E) |
| 306-307 [57] *Severus (W, augustus) |
| 306-312 [58] *Maxentius (W) |
| 306-337 [59] *Constantine-I the Great (W→all) |
| 308-324 [60] *Licinius (W→E) |
| 310-313 [61] *Maximinus II Daia (W) |
| 337-340 [62] *Constantine II (Gaul) |
| 337-350 [63] *Constans (Italy→W) |
| 337-361 [64] *Constantius II (E→all) |
| 360-363 [65] *Julian |
| 363-364 [66] Jovian |
| 364-455 Valentinian-Theodosian Dynasty |
| 364-375 [67] *Valentinian-I (All→W) |
| 364-378 [68] Valens (E) |
| 367-383 [69] *Gratian (W→All→Gaul) |
| 375-392 [70] *Valentinian II (Italy→W) |
| 379-395 [71] *Theodosius-I (E→All) |
| 383-408 [72] *Arcadius (E) |
| 384-388 [73] *Magnus Maximus (W) |
| 384-388 [74] *Flavius Victor (W) |
| Interregnum (392–425) |
| 393-423 [75] *Flavius Honorius (W) |
| 402-450 [76] *Theodosius II (E) |
| 409-411 [77] *Constantine III (W) |
| 409-411 [78] *Constans II (W) |
| …421 [79] *Constantius III (W) |
| Restoration (425-455) |
| 425-455 [80] *Valentinian III (W) |
| 450-457 [81] Marcian (E) |
| 455-476 Non-Dynastic (W) and the Leonid Dynasty (E) |
| …455 [82] Petronius Maximus (W) |
| 455-456 [83] Avitus (W) |
| 457-474 [84] Leo-I (E) |
| 457-461 [85] Majorian (W) |
| 461-465 [86] Libius Severus (W) |
| 467-472 [87] Anthemius (W) |
| …472 [88] Olybrius (W) |
| 473-474 [89] Glycerius (W) |
| …474 [90] *Leo Ii (E) |
| 474-475 [91] *Zeno (E) [1/2] |
| 474-475 [92] Julius Nepos (W) |
| 475-476 [93] Basiliscus (E) |
| 475-476 [94] Romulus Augustus (W) |
| 476-491 [95] Zeno (E) [2/2] |
| * Joint emperors |
| (u) Successful usurpers |
Roman Emperors (27 BC-AD 476), Chronology
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