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Birth Constantius III Birth, Marriage, Death in the UK Constantius III
- Constantius III
- Constantius III
- Constantius III

Constantius III
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| Constantius III |
Emperor of the
Western Roman Empire |

Constantius on a solidus. The reverse shows Constantius as a general, holding Victory in one hand and a captive enemy in the other. |
| Reign |
421 (7 months, as co-emperor in the west with Honorius) |
| Full name |
Flavius Constantius |
| Born |
Naissus (Niš, Serbia) |
| Died |
2 September 421 |
| Predecessor |
Honorius (alone) |
| Successor |
Honorius (alone) |
| Wife |
Galla Placidia |
| Offspring |
Valentinian III, Justa Grata Honoria |
Flavius Constantius (died 2 September 421), whose name is traditionally anglicized as Constantius III, was a late Roman general, politician, and emperor. He was the power behind the throne for much of the 410s, and in 421 briefly became co-emperor of the Western Empire with Honorius.
Constantius was born in Naissus (modern-day Niš, Serbia) and was probably a career soldier. As a magister militum under Honorius, he gained note by his successful campaigns in defense of the Western Roman Empire, in which he pushed back barbarian invasions and ended the revolt of the usurper Constantine III. As a result, he was given the title of Patrician, and began to exert more and more influence over the weak Honorius. In 417 he married Honorius' sister, Galla Placidia, and on February 8, 421, was elevated to co-Emperor. At this point, he effectively ruled the West. Notably, Constantius reportedly complained about the loss of personal freedom and privacy that came with the imperial office.
Honorius' nephew, the Eastern Roman Emperor Theodosius II refused to recognize Constantius' imperial status. Constantius reportedly intended to launch a campaign against the Eastern Empire to force recognition of his rights, but before anything could come of these plans, he died suddenly on September 2 after less than seven months as emperor.
Constantius and Galla Placida had a son Valentinian III, who became Emperor, and a strong-willed daughter, Justa Grata Honoria. Constantius' success in rising from head of the dwindling Roman army to Imperial rank obviously influenced the actions of later holders of the patrician office, a list that includes Flavius Aëtius and Ricimer; however, only Petronius Maximus ever made the same leap, and his reign was even shorter than that of Constantius.
Media related to Constantius III at Wikimedia Commons
Preceded by
Honorius |
Western Roman Emperor
Served alongside: with Honorius |
Succeeded by
Honorius |
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Western and Eastern Roman Emperors |
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Principate
27 BC – 235 |
Augustus · Tiberius · Caligula · Claudius · Nero · Galba · Otho · Vitellius · Vespasian · Titus · Domitian · Nerva · Trajan · Hadrian · Antoninus Pius · Marcus Aurelius · Commodus · Pertinax · Didius Julianus · Septimius Severus · Caracalla · Geta · Macrinus · Elagabalus · Alexander Severus
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Crisis
235–284 |
Maximinus Thrax · Gordian I · Gordian II · Pupienus · Balbinus · Gordian III · Philip the Arab · Decius · Trebonianus Gallus · Hostilian · Volusianus · Aemilianus · Valerian · Gallienus · Claudius Gothicus · Quintillus · Aurelian · Tacitus · Florianus · Probus · Carus · Carinus · Numerian
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Dominate
284–395 |
Diocletian · Maximian · Constantius Chlorus · Galerius · Severus · Maxentius · Maximinus Daia · Licinius · Valerius Valens · Martinianus · Constantine I · Constantine II · Constans I · Constantius II · Julian · Jovian · Valentinian I · Valens · Gratian · Valentinian II · Theodosius I
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Western Empire
395–480 |
Honorius · Constantius III · Joannes · Valentinian III · Petronius Maximus · Avitus · Majorian · Libius Severus · Anthemius · Olybrius · Glycerius · Julius Nepos · Romulus Augustulus
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Eastern/
Byzantine Empire
395–1204 |
Arcadius · Theodosius II · Marcian · Leo I · Leo II · Zeno · Basiliscus · Anastasius I · Justin I · Justinian I · Justin II · Tiberius II Constantine · Maurice · Phocas · Heraclius · Constantine III · Heraklonas · Constans II · Constantine IV · Justinian II · Leontios · Tiberios III · Philippikos · Anastasios II · Theodosios III · Leo III the Isaurian · Constantine V · Artabasdos · Leo IV the Khazar · Constantine VI · Irene · Nikephoros I · Staurakios · Michael I Rangabe · Leo V the Armenian · Michael II · Theophilos · Theodora I · Michael III · Basil I · Leo VI the Wise · Alexander · Constantine VII · Romanos I · Romanos II · Nikephoros II · John I Tzimiskes · Basil II · Constantine VIII · Zoe · Romanos III · Michael IV · Michael V · Constantine IX · Theodora II · Michael VI · Isaac I · Constantine X · Michael VII · Romanos IV · Nikephoros III · Alexios I · John II · Manuel I · Alexios II · Andronikos I · Isaac II · Alexios III Angelos · Alexios IV · Nikolaos Kanabos · Alexios V
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Empire of Nicaea
1204–1261 |
Constantine Laskaris · Theodore I · John III · Theodore II · John IV
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Byzantine Empire
1261–1453 |
Michael VIII · Andronikos II · Michael IX · Andronikos III · John V · John VI · Matthew · Andronikos IV · John VII · Andronikos V · Manuel II · John VIII · Constantine XI
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