| Name, Lineage or Basis of Accession and Cause of Death | Period of Rule | Birth | Death |
|---|
| THE CÆSARS | | | |
| Octavianus Cæsar, “Augustus” (majesty).—A title conferred by the Senate;died August 19 | B.C.27-A.D.14 | B.C.63 | | A.D.19 | |
| Tiberius (Claudius Nero).—Stepson of Augustus; murdered by a tribune | A.D.14-37 | 42 | | 37 | |
| Caius Caligula.—Youngest son of Germanicus, nephew of Tiberius; poisoned by his wife,Agrippina, to make way for | 37 | - | 41 | | 12 | | 41 | |
| Claudius I. (Tiberius Drusus).—Grandson of Tiberius | 41 | - | 54 | | 10 | | 54 | |
| Claudius Nero.—Son of Domitius Ahenobarbus; deposed; kills himself | 54 | - | 68 | | A.D.37 | | 68 | |
| Servius Sulpicius Galba.—Proclaimed Emperor; slain by the prætorians | 68 | - | 69 | | B.C. 3 | | 69 | |
| M. Salvius Otho.—Proclaimed Emperor; stabbed himself | 69 | - | | A.D.32 | | 69 | |
| Aulus Vitellius.—Proclaimed Emperor; deposed by Vespasian, and put to death | 69 | - | 69 | | 15 | | 69 | |
| Titus Flavius Vespasian.—Proclaimed Emperor | 70 | - | 79 | | 9 | | 79 | |
| Titus (Vespasian).—Son of Vespasian | 79 | - | 81 | | 41 | | 81 | |
| Titus Flavius Domitian.—Brother of Titus, second son of Vespasian; last of the twelveCæsars | 81 | - | 96 | | 51 | | 96 | |
| THE FIVE GOOD EMPERORS | | | |
| Cocceius Nerva.—Proclaimed Emperor | 96 | - | 98 | | 32 | | 98 | |
| Trajan (M. Ulpius Crinitus).—Adopted son of Nerva | 98 | - | 117 | | 53 | | 117 | |
| Hadrian (Publius Ælius).—Nephew of Trajan | 117 | - | 138 | | 76 | | 138 | |
| Antoninus Titus, surnamed Pius.—Adopted son of Hadrian | 138 | - | 161 | | 86 | | 161 | |
| Marcus Aurelius Antoninus.—Nephew of Antoninus Pius | 161 | - | 180 | | 121 | | 180 | |
| THE PERIOD OF MILITARY DESPOTISM | | | |
| Commodus (L. Aurelius Antoninus).—Son of Marcus Aurelius; poisoned by his favorite mistress,Martia, December 31 | 180 | - | 193 | | 161 | | 192 | |
| Publius Helvius Pertinax.—Proclaimed Emperor; killed by prætorian band | 193 | - | | 126 | | 193 | |
| Didius Julianus.—Proclaimed Emperor | 193 | - | | | ... | 193 | |
| Lucius Septimus Severus.—Proclaimed Emperor; died at York, in Britain | 193 | - | 212 | ? | 146 | | 211 | |
| M. Aurelius Caracalla and Septimius Geta.—Son of Septimius Severus; Caracalla murders Geta,212; is slain by his successors | 212 | - | 217 | | 188 | | 217 | |
| M. Opilius Macrinus, prefect of the guards; beheaded in a mutiny | 217 | - | 218 | | 164 | | 218 | |
| Heliogabalus (M. Aurelius Antoninus), a youth (Elagabalus).—First cousin of Caracalla; put todeath for enormities | 218 | - | 222 | | 205 | ? | 222 | |
| Alexander Severus.—Cousin of Heliogabalus, by whom he was adopted; assassinated by soldierscorrupted by Maximinus | 222 | - | 235 | | 205 | | 235 | |
| Caius Julius Verus Maximinus.—Elevated by soldiers; assassinated in his tent | 235 | - | 238 | | 173 | | 238 | |
| M. Antonius Gordianus and his son; the latter falling in battle with partisans of Maximinus, thefather strangled himself in despair, at Carthage, in his eightieth year.—Appointed by the Senate | 238 | - | 238 | | | ... | (238 (238 | |
| Gordian II.—Grandson of Gordian I.; assassinated by guards, instigated by Philip theArabian | 238 | - | 244 | | 224 | | 244 | |
| Philip the Arabian.—Murdered Gordian and usurped the throne; assassinated by his soldiers | 244 | - | 249 | | | ... | 249 | |
| [402]MetiusDecius.—Proclaimed Emperor by the army; he perished in battle with Goths | 249 | - | 251 | | | ... | 251 | |
| Gallus Hostilius, and his son Volusianus.—Elected Emperor by Senate and soldiers; both slainby soldiers | 251 | - | 254 | | | ... | 254 | |
| Æmilianus.—Elected Emperor by Senate and soldiers; put to death after reign of fourmonths | 254 | - | | 208 | ? | 254? | |
| Valerian.—Elected Emperor by Senate and soldiers; taken prisoner by Sapor, king of Persia, andflayed alive | 254 | - | 260 | | | ... | 260 | |
| Gallienus | 260 | - | 268 | | | ... | 268 | |
| Flavius Claudius | 268 | - | 270 | | 214 | | 270 | |
| Aurelian.—Designated by Claudius; assassinated by soldiers on march against Persia | 270 | - | 275 | | 212 | | 275 | |
| Tacitus.—Elected by Senate and soldiers; died at Tarsus, in Cilicia | 275 | - | 276 | | 200 | | 276 | |
| Florian.—Proclaimed Emperor; not recognized by Senate | 276 | - | 276 | | | ... | | ? | |
| M. Aurelius Probus.—Choice of the army; assassinated by troops at Sirmium | 277 | - | 282 | | | ... | 282 | |
| M. Aurelius Carus.—Elevated to throne by soldiers; killed at Ctesiphon by lightning | 282 | - | 283 | | 222 | | 283 | |
| Carinus—Elder son of Carus | | - | both assassinated | 284 | - | 284 | | ... | 285 | |
| and |
| Numerian.—Son of Carus |
| Diocletian.—Proclaimed Emperor by the army | | - | 284 | - | 305 | | - | | 245 | | 313 | |
| and | | |
| Maximian.—Made Cæsar by Diocletian | ... | 310 | |
| | | | |
| Constantius | | - | Created Cæsar | 305 | - | 306 | | - | | 250 | | 306 | |
| and | |
| Galerius | ... | 311 |
| Constantine the Great.—Eldest son of Augustus Constantius Chlorus | 306 | - | 336 | | 272 | | 337 | |
| Constantius II.—Third son of Constantine the Great | 336 | - | 361 | | 317 | | 361 | |
| Julian the Apostate.—Son of Julius Constantius; mortally wounded in battle with Persians | 361 | - | 363 | | 331 | | 363 | |
| Jovian.—Elevated to the throne by the army | 363 | - | 364 | | 332 | | 364 | |
| ROMAN EMPERORS OF THE WEST | | | |
| Tacitus.—Elected by Senate and soldiers; died at Tarsus, in Cilicia | 275 | - | 276 | | 200 | | 276 | |
| Valentinian I.—Proclaimed Emperor by the army | 364 | - | 375 | | 321 | | 375 | |
| Gratian.—Son of Valentinian I | 375 | - | 383 | | 359 | | 383 | |
| Maximus—Made Emperor by the legions in Britain | 383? | | | ? | 398 | |
| Valentinian II.—Son of Valentinian I | 383? | - | 388 | | 371 | | 392 | |
| Eugenius.—Proclaimed Emperor | 388 | - | 394 | | | ... | | ... |
| Theodosius the Great.—Son of Theodosius, a Roman general | 394 | - | 395 | | 346 | | 395 | |
| Honorius.—Second son of Theodosius | 395 | - | 423 | | 384 | | 423 | |
| Valentinian III.—Son of Constantius | 423 | - | 455 | | 419 | | 455 | |
| Maximus Petronius.—Proclaimed Emperor | 455 | - | | | 395 | ? | 455 | |
| Avitus.—Assumed the purple | 455 | - | 457 | | | ... | 457 | |
| Majorian or Majorien.—Elected by Ricimer | 457 | - | 461 | | | ... | | ? |
| Severus.—Raised to imperial dignity by Ricimer | 461 | - | 467 | | | ... | | 465-7 | ? |
| Anthemius.—Son-in-law of Emperor Marcian | 467 | - | 472 | | | ... | | ? |
| Olybrius.—Made Emperor through influence of Ricimer | 472 | - | 473 | | | ... | | ? |
| Glycerus.—Proclaimed Emperor (or Genseric) | 473 | - | | | ... | | ? |
| Nepos.—Proclaimed Emperor by order of Leo X. | 473 | - | 475 | | | ... | 480 | |
| Romulus Augustulus.—Son of Orestes | 475 | - | 476 | | | ... | 476 | |
| Augustus is deposed and banished by Odoácer, who thus puts anend to the Western Empire of Rome. | | | |