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<div style="font-size: 1.1em;">{{Colorlink|List of Roman emperors|color-mix(in srgb, #8B0000 55%, #f5f5f7)|Roman}} and {{Colorlink|List of Byzantine emperors|color-mix(in srgb, #8B0000 55%, #f5f5f7)|Byzantine emperors}}</div>
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! style="background-color: #8B0000; color: #FFF8E7;" | '''[[Principate|<span style="color: #FFF8E7;">Principate</span>]]''' <small>(27 BC – AD 235)</small>
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| style="text-align: left; padding: 6px 10px;" | [[Augustus]] · [[Tiberius]] · [[Caligula]] · [[Claudius]] · [[Nero]] · [[Galba]] · [[Otho]] · [[Vitellius]] · [[Vespasian]] · [[Titus]] · [[Domitian]] · [[Nerva]] · [[Trajan]] · [[Hadrian]] · [[Antoninus Pius]] · [[Marcus Aurelius]] · [[Lucius Verus]] · [[Commodus]] · [[Pertinax]] · [[Didius Julianus]] · [[Septimius Severus]] · [[Caracalla]] · [[Geta (emperor)|Geta]] · [[Macrinus]] <small>(w. ''[[Diadumenian]]'')</small> · [[Elagabalus]] · [[Severus Alexander]]
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! style="background-color: #8B0000; color: #FFF8E7;" | '''[[Crisis of the Third Century|<span style="color: #FFF8E7;">Crisis of the Third Century</span>]]''' <small>(235–284)</small>
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| style="text-align: left; padding: 6px 10px;" | [[Maximinus Thrax|Maximinus I]] · [[Gordian I]] · [[Gordian II]] · [[Pupienus]] · [[Balbinus]] · [[Gordian III]] · [[Philip the Arab|Philip I]] <small>(w. ''[[Philip II (Roman emperor)|Philip II]]'')</small> · [[Decius]] <small>(w. ''[[Herennius Etruscus]]'')</small> · [[Trebonianus Gallus]] <small>(w. ''[[Hostilian]]'' & ''[[Volusianus]]'')</small> · [[Aemilianus]] · <u>[[Silbannacus]]</u> (?) · [[Valerian (emperor)|Valerian]] · [[Gallienus]] <small>(w. ''[[Saloninus]]'')</small> · [[Claudius Gothicus|Claudius II]] · [[Quintillus]] · [[Aurelian]] · [[Tacitus (emperor)|Tacitus]] · [[Florianus]] · [[Probus (emperor)|Probus]] · [[Carus]] · [[Carinus]] · [[Numerian]]
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! style="background-color: #8B0000; color: #FFF8E7;" | '''[[Later Roman Empire|<span style="color: #FFF8E7;">Later Roman Empire</span>]]''' <small>(284–395)</small>
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| style="text-align: left; padding: 6px 10px;" | [[Diocletian]] · [[Maximian]] · [[Galerius]] · [[Constantius Chlorus|Constantius I]] · [[Severus II]] · [[Constantine the Great|Constantine I]] · <u>[[Maxentius]]</u> · <u>[[Domitius Alexander]]</u> · [[Licinius]] · [[Maximinus Daza|Maximinus II]] · [[Valerius Valens]] · [[Martinian (emperor)|Martinian]] · [[Constantine II (emperor)|Constantine II]] · [[Constantius II]] · [[Constans|Constans I]] · <u>[[Magnentius]]</u> · <u>[[Nepotianus]]</u> · <u>[[Vetranio]]</u> · [[Julian (emperor)|Julian]] · [[Jovian (emperor)|Jovian]] · [[Valentinian I]] · [[Valens]] · <u>[[Procopius (usurper)|Procopius]]</u> · [[Gratian]] · [[Theodosius I]] · [[Valentinian II]] · [[Magnus Maximus]] <small>(w. ''[[Victor (emperor)|Victor]]'')</small> · <u>[[Eugenius]]</u>
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! style="background-color: #8B0000; color: #FFF8E7;" | '''[[Western Roman Empire|<span style="color: #FFF8E7;">Western Roman Empire</span>]]''' <small>(395–476)</small>
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| style="text-align: left; padding: 6px 10px;" | [[Honorius]] · [[Constantine III (Western Roman emperor)|Constantine III]] <small>(w. ''[[Constans II (son of Constantine III)|Constans II]]'')</small> · <u>[[Priscus Attalus]]</u> · [[Constantius III]] · <u>[[Joannes]]</u> · [[Valentinian III]] · <u>[[Petronius Maximus]]</u> · <u>[[Avitus]]</u> · [[Majorian]] · <u>[[Libius Severus|Severus III]]</u> · [[Anthemius]] · <u>[[Olybrius]]</u> · <u>[[Glycerius]]</u> · [[Julius Nepos]] · <u>[[Romulus Augustulus]]</u>
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! style="background-color: #8B0000; color: #FFF8E7;" | '''[[Byzantine Empire|<span style="color: #FFF8E7;">Eastern / Byzantine Empire</span>]]''' <small>(395–641)</small>
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| style="text-align: left; padding: 6px 10px;" | [[Arcadius]] · [[Theodosius II]] · [[Marcian]] · [[Leo I (emperor)|Leo I]] · [[Leo II (emperor)|Leo II]] · [[Zeno (emperor)|Zeno]] · [[Basiliscus]] <small>(w. ''[[Marcus (son of Basiliscus)|Marcus]]'')</small> · [[Anastasius I Dicorus|Anastasius I]] · [[Justin I]] · [[Justinian I]] · [[Justin II]] · [[Tiberius II Constantine]] · [[Maurice (emperor)|Maurice]] <small>(w. ''[[Theodosius (son of Maurice)|Theodosius]]'')</small> · [[Phocas]] · [[Heraclius]]
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! style="background-color: #8B0000; color: #FFF8E7;" | '''[[Byzantine Empire|<span style="color: #FFF8E7;">Byzantine Empire</span>]]''' <small>(641–1453)</small>
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| style="text-align: left; padding: 6px 10px;" | [[Heraclius Constantine|Constantine III]] · [[Heraclonas]] <small>(w. ''[[David (son of Heraclius)|Tiberius]]'')</small> · [[Constans II]] · [[Constantine IV]] <small>(w. ''[[Heraclius (son of Constans II)|Heraclius]]'' & ''[[Tiberius (son of Constans II)|Tiberius]]'')</small> · [[Justinian II]] · [[Leontius]] · [[Tiberius III]] · [[Justinian II]] <small>(2nd reign, w. ''[[Tiberius (son of Justinian II)|Tiberius]]'')</small> · [[Philippicus]] · [[Anastasius II (emperor)|Anastasius II]] · [[Theodosius III]] · [[Leo III the Isaurian|Leo III]] · [[Constantine V]] · <u>[[Artabasdos]]</u> <small>(w. ''<u>[[Nikephoros (son of Artabasdos)|Nikephoros]]</u>'')</small> · [[Leo IV the Khazar|Leo IV]] · [[Constantine VI]] · [[Irene of Athens|Irene]] · [[Nikephoros I]] · [[Staurakios]] · [[Michael I Rangabe]] · [[Leo V the Armenian|Leo V]] · [[Michael II]] · [[Theophilos (emperor)|Theophilos]] · [[Michael III]] · [[Basil I]] · [[Leo VI the Wise|Leo VI]] · [[Alexander (Byzantine emperor)|Alexander]] · [[Constantine VII]] · [[Romanos I Lekapenos]] · [[Romanos II]] · [[Nikephoros II Phokas]] · [[John I Tzimiskes]] · [[Basil II]] · [[Constantine VIII]] · [[Zoe Porphyrogenita|Zoe]] · [[Romanos III Argyros]] · [[Michael IV the Paphlagonian|Michael IV]] · [[Michael V Kalaphates|Michael V]] · [[Constantine IX Monomachos]] · [[Theodora Porphyrogenita|Theodora]] · [[Michael VI Bringas]] · [[Isaac I Komnenos]] · [[Constantine X Doukas]] · [[Eudokia Makrembolitissa]] · [[Romanos IV Diogenes]] · [[Michael VII Doukas]] · [[Nikephoros III Botaneiates]] · [[Alexios I Komnenos]] · [[John II Komnenos]] · [[Manuel I Komnenos]] · [[Alexios II Komnenos]] · [[Andronikos I Komnenos]] · [[Isaac II Angelos]] · [[Alexios III Angelos]] · [[Alexios IV Angelos]] · [[Alexios V Doukas]] · [[Theodore I Laskaris]] · [[John III Vatatzes]] · [[Theodore II Laskaris]] · [[John IV Laskaris]] · [[Michael VIII Palaiologos]] · [[Andronikos II Palaiologos]] · [[Michael IX Palaiologos]] · [[Andronikos III Palaiologos]] · [[John V Palaiologos]] · [[John VI Kantakouzenos]] · [[Andronikos IV Palaiologos]] · [[John VII Palaiologos]] · [[Manuel II Palaiologos]] · [[John VIII Palaiologos]] · [[Constantine XI Palaiologos]]
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! style="background-color: #FFF8E7; color: #8B0000;" darkstyle="background-color: var(--wiki-surface); color: color-mix(in srgb, #8B0000 55%, #f5f5f7);" | '''Related'''
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| style="text-align: left; padding: 6px 10px;" | [[Gallic Empire|Gallic emperors]] (260–274) · [[List of Palmyrene monarchs|Palmyrene emperors]] (271–273) · [[Carausian revolt|Britannic emperors]] (286–296) · [[List of Trapezuntine emperors|Trapezuntine emperors]] (1204–1461) · [[Empire of Thessalonica|Thessalonian emperors]] (1224–1242) · [[List of Roman and Byzantine empresses|Empresses]] · [[List of Augustae|Augustae]] · [[Roman usurper|Usurpers]]
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| style="font-size: 0.85em; padding: 4px;" | ''Italics'' indicate a junior co-emperor · <u>Underline</u> indicates disputed legitimacy / possible usurper
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