| Augustus |
27 BC - AD 14 |
| Tiberius |
14 - 37 |
| Gaius (Caligula) |
37 - 41 |
| Claudius |
41 - 54 |
| Nero |
54 - 68 |
| Galba |
68 - 9 |
| Otho |
69 |
| Vitellius |
69 |
| Vespasian |
69 - 79 |
| Titus |
79 - 81 |
| Domitian |
81 - 96 |
| Nerva |
96 - 8 |
| Trajan |
98 - 117 |
| Hadrian |
117 - 38 |
| Antoninus Pius |
138 - 61 |
| Marcus Aurelius and Lucius Verus |
161 - 9 |
| Marcus Aurelius alone |
169 - 77 |
| Marcus Aurelius and Commodus |
177 - 80 |
| Commodus alone |
180 - 92 |
| Pertinax |
193 |
| Didius Julianus |
193 |
| Septimius Severus alone |
193 - 8 |
| Septimius Severus and Antoninus (Caracalla) |
198 - 209 |
| Septimius Severus, Antoninus (Caracalla) and Geta |
209 - 11 |
| Antoninus (Caracalla) and Geta |
211 - 12 |
| Antoninus (Caracalla) alone |
212 - 17 |
| Macrinus alone |
217 - 18 |
| Macrinus and Diadumenianus |
218 |
| Antoninus (Elagabalus) |
218 - 22 |
| Alexander Severus |
222 - 35 |
| Maximinus Thrax |
235 - 8 |
| Gordian I and Gordian II |
238 |
| Pupienus and Balbinus |
238 |
| Gordian III |
238 - 44 |
| Philip the Arabian alone |
244 - 7 |
| Philip the Arabian and Philip |
247 - 9 |
| Decius |
249 - 51 |
| Treonianus Gallus and Volusianus |
251 - 3 |
| Aemilianus |
253 |
| Valerian and Gallienus |
253 - 60 |
| Gallienus alone |
260 - 8 |
| Claudius II (Gothicus) |
268 - 70 |
| Quintillus |
270 |
| Aurelian |
270 - 5 |
| Tacitus |
275 - 6 |
| Florian |
276 |
| Probus |
276 - 82 |
| Carus |
282 - 3 |
| Carinus and Numerianus |
283 - 4 |
| Diocletian alone |
284 - 6 |
| Diocletian and Maximian |
286 - 305 |
| Constantius I and Galerius |
305 - 6 |
| Galerius, Severus and Constantine I |
306 - 7 |
| Galerius, Licinius and Constantine I |
307 - 10 |
| Galerius, Licinus, Constantine I and Maximinus Daia |
310 - 11 |
| Licinius and Constantine I |
311 - 24 |
| Constantine II, Constantius II and Constans |
337 - 40 |
| Constantius II and Constans |
340 - 50 |
| Constantius II alone |
350 - 61 |
| Julian (the Apostate) |
361 - 3 |
| Jovian |
363 - 4 |
| Valentinian I and Valens |
364 - 7 |
| Valentinian I, Valens and Gratian |
367 - 75 |
| Valens, Gratian and Valentinian II |
375 - 8 |
| Gratian, Valentinian II and Theodosius I |
379 - 83 |
| Valentinian II, Theodosius I and Arcadius |
383 - 92 |
| Theodosius I and Arcadius |
392 - 3 |
| Theodosius I, Arcadius and Honorius |
393 - 5 |
