Portrait Name
[a]
Reign Notes
Constantinian dynasty (306–363)
Constantine I
"the Great"
Κωνσταντῖνος ὁ Μέγας
Fl. Valerius Constantinus
25 July 306 –
22 May 337
(30 years, 9 months and 27 days)
Born at Naissus c. 272 as the son of the Augustus Constantius and Helena. Proclaimed Augustus of the western empire upon the death of his father on 25 July 306, he became sole ruler of the western empire after the Battle
of the Milvian Bridge in 312. In 324, he defeated the eastern Augustus Licinius and re-united the empire under his rule, reigning as sole emperor until his death. Constantine completed the administrative and military reforms
begun under Diocletian, who had begun ushering in the Dominate period. Actively interested in Christianity, he played a crucial role in its development and the Christianization of the Roman world, through his convocation of
the First Ecumenical Council at Nicaea. He is said to have received baptism on his deathbed. He also reformed coinage through the introduction of the gold solidus, and initiated a large-scale building program, crowned by the
re-foundation the city of Byzantium as "New Rome", popularly known as Constantinople. He was regarded as the model of all subsequent Byzantine emperors.
[6]
Constantius II
Κωνστάντιος
Fl. Iulius Constantius
22 May 337 –
3 November 361
(24 years, 1 month and 25 days)
Born on 7 August 317, as the second surviving son of Constantine I, he inherited the eastern third of Roman Empire upon his father's death, sole Roman Emperor from 353, after the overthrow of the western usurper
Magnentius. Constantius' reign saw military activity on all frontiers, and dissension between Arianism, favoured by the emperor, and the "Orthodox" supporters of the Nicene Creed. In his reign, Constantinople was accorded
equal status to Rome, and the original Hagia Sophia was built. Constantius appointed Constantius Gallus and Julian as Caesares, and died on his way to confront Julian, who had risen up against him.
[7]
Julian "the Apostate"
Ἰουλιανὸς ὁ Ἀποστάτης
Fl. Claudius Iulianus
3 November 361 –
26 June 363
(1 year, 7 months and 23 days)
Born in May 332, grandson of Constantius Chlorus and cousin of Constantius II. Proclaimed by his army in Gaul, became legitimate Emperor upon the death of Constantius. Killed on campaign against Sassanid Persia.
Non-dynastic (363–364)
Jovian
Ἰοβιανός
Claudius Iovianus
[b]
27 June 363 –
17 February 364
(7 months and 21 days)
Born c. 332. Captain of the guards under Julian, elected by the army upon Julian's death. Died on journey back to Constantinople.
Valentinianic dynasty (364–379)
Valentinian I
Οὐαλεντινιανός
Valentinianus
26 February –
28 March 364
(1 month and 2 days)
Born in 321. An officer under Julian and Jovian, he was elected by the army upon Jovian's death. He soon appointed his younger brother Valens as Emperor of the East, while he himself ruled in the West. Died of cerebral
haemorrhage in 375.
Valens
Οὐάλης
28 March 364 –
9 August 378
(14 years, 4 months and 12 days)
Born in 328. A soldier of the Roman army, he was appointed Emperor of the East by his elder brother Valentinian I. Killed at the Battle of Adrianople.
Gratian
Γρατιανός, Gratianus
9 August 378 –
19 January 379
(5 months and 10 days)
Born on 18 April/23 May 359, the son of Valentinian I. Emperor of the West, he inherited rule of the East upon the death of Valens and appointed Theodosius I as Emperor of the East. Assassinated on 25 August 383 during
the rebellion of Magnus Maximus.
Theodosian dynasty (379–457)
Theodosius I
"the Great"
Θεοδόσιος ὁ Μέγας
19 January 379 –
17 January 395
(15 years, 11 months and 29 days)
Born on 11 January 347, in Spain. Aristocrat and military leader, brother-in-law of Gratian, who appointed him as emperor of the East. He reunited the whole Empire after defeating Eugenius at the Battle of the Frigidus, on 6
September 394. The last emperor to rule both halves of the Empire.
Arcadius
Ἀρκάδιος
17 January 395 –
1 May 408
(13 years, 3 months and 14 days)
Born in 377/378, the eldest son of Theodosius I; proclaimed Augustus on 16 January 383. On the death of Theodosius I in 395, the Roman Empire was permanently divided between the Eastern Roman Empire, later referred to
as the Byzantine Empire, and the Western Roman Empire. Theodosius' eldest son Arcadius became emperor in the East while his younger son Honorius became emperor in the West.
Theodosius II
Θεοδόσιος
1 May 408 –
28 July 450
(42 years, 2 months and 27 days)
Born on 10 April 401, the only son of Arcadius; proclaimed Augustus on 10 January 402. Succeeded upon the death of his father. As a minor, the praetorian prefect Anthemius was regent in 408–414. He died in a riding
accident.
Marcian
Μαρκιανός, Marcianus
25 August 450 –
27 January 457
(6 years, 5 months and 2 days)
Born in 396. A soldier and politician, he became emperor after being wed by the Augusta Pulcheria, sister of Theodosius II, following the latter's death. Died of gangrene.
Leonid dynasty (457–518)
Leo I "the Great" and "the Butcher"
Λέων ὁ Μέγας / Μακέλλης
7 February 457 –
18 January 474
(16 years, 11 months and 11 days)
Born in Dacia c. 400, and of Bessian origin, Leo became a low-ranking officer and served as an attendant of the Gothic magister militum, Aspar, who chose him as emperor on Marcian's death. He was the first emperor to be
crowned by the Patriarch of Constantinople, and the first one to legislate in Greek.
[8]
His reign was marked by the pacification of the Danube and peace with Persia, which allowed him to intervene in the affairs of the West,
supporting candidates for the throne and dispatching an expedition to recover Carthage from the Vandals in 468. Initially a puppet of Aspar, Leo began promoting the Isaurians as a counterweight to Aspar's Goths, marrying
his daughter Ariadne to the Isaurian leader Tarasicodissa (Zeno). With their support, in 471 Aspar was murdered and Gothic power over the army was broken.
[9]
Leo II "the Little"
Λέων ὁ μικρός
18 January –
November 474
(10 months)
Born 468, he was the grandson of Leo I by Leo's daughter Ariadne and her Isaurian husband, Zeno. He was raised to Augustus on 17 November 473. Leo ascended the throne after the death of his grandfather on 18 January
474. He crowned his father as co-emperor and effective regent on 29 January, dying shortly after.
Zeno
Ζήνων (Ταρασικοδίσσας)
29 January 474 –
9 January 475
(11 months and 11 days)
August 476 –
9 April 491 (14 years and 8 months)
Born c. 425 in Isauria, originally named Tarasicodissa. As the leader of Leo I's Isaurian soldiers, he rose to comes domesticorum, married the emperor's daughter Ariadne and took the name Zeno, and played a crucial role in
the elimination of Aspar and his Goths. He was named co-emperor by his son on 29 January 474 and became sole ruler upon the latter's death, but had to flee to his native country before Basiliscus in 475, regaining control of
the capital in 476. Zeno concluded peace with the Vandals, saw off challenges against him by Illus and Verina, and secured peace in the Balkans by enticing the Ostrogoths under Theodoric the Great to migrate to Italy. Zeno's
reign also saw the end of the western line of emperors. His pro-Monophysite stance made him unpopular and his promulgation of the Henotikon resulted in the Acacian Schism with the papacy.
[10]
Basiliscus
Βασιλίσκος
9 January 475 –
August 476
(1 year and 7 months)
General and brother-in-law of Leo I, seized power from Zeno and crowned himself emperor on 12 January. Zeno was restored soon after. Died in 476/477
Anastasius I "Dicorus"
Ἀναστάσιος ὁ Δίκορος
11 April 491 –
9 July 518
(27 years, 2 months and 28 days)
Born c. 430 at Dyrrhachium, he was a palace official (silentiarius) when he was chosen as her husband and Emperor by Empress-dowager Ariadne. He was nicknamed "Dikoros" (Latin: Dicorus), because of his heterochromia.
Anastasius reformed the tax system and the Byzantine coinage and proved a frugal ruler, so that by the end of his reign he left a substantial surplus. His Monophysite sympathies led to widespread opposition, most notably
the Revolt of Vitalian and the Acacian Schism. His reign was also marked by the first Bulgar raids into the Balkans and by a war with Persia over the foundation of Dara. He died childless.
[11]
Justinian dynasty (518–602)
Justin I
Ἰουστῖνος, Iustinus
9 July 518 –
1 August 527
(9 years and 23 days)
Born c. 450 at Bederiana (Justiniana Prima), Dardania. Officer and commander of the Excubitors bodyguard under Anastasius I, he was elected by army and people upon the death of Anastasius I.
Justinian I "the Great"
Ἰουστινιανὸς ὁ Μέγας
Petrus Sabbatius Iustinianus
1 April 527 –
14 November 565
(38 years, 7 months and 13 days)
Born in 482/483 at Tauresium (Taor), Macedonia. Nephew of Justin I, raised to co-emperor on 1 April 527. Succeeded on Justin I's death. Attempted to restore the western territories of the Empire, reconquering Italy, North
Africa and parts of Spain. Also responsible for the corpus juris civilis, or the "body of civil law," which is the foundation of law for many modern European nations.
[12]
Justin II
Ἰουστῖνος, Iustinus
14 November 565 –
5 October 578
(12 years, 10 months and 21 days)
Born c. 520. Nephew of Justinian I, he seized the throne on the death of Justinian I with support of army and Senate. Became insane, hence in 573–574 under the regency of his wife Sophia, and in 574–578 under the regency
of Tiberius Constantine.
Tiberius II Constantine
Τιβέριος Κωνσταντῖνος
Tiberius Constantinus
5 October 578 –
14 August 582
(3 years, 10 months and 19 days)
Born c. 535, commander of the Excubitors, friend and adoptive son of Justin. Was named Caesar and regent in 574. Succeeded on Justin II's death.
Maurice
Μαυρίκιος Τιβέριος
Mauricius Tiberius
14 August 582 –
27 November 602
(20 years, 3 months and 14 days)
Born in 539 at Arabissus, Cappadocia. Became an official and later a general. Married the daughter of Tiberius II and was proclaimed emperor on 13 August 582. Named his son Theodosius as co-emperor in 590. Deposed by
Phocas and executed on 27 November 602 at Chalcedon.
Non-dynastic (602–610)
Phocas
Φωκᾶς, Focas
23 November 602 –
5 October 610
(7 years, 10 months and 12 days)
Subaltern in the Balkan army, he led a rebellion that deposed Maurice. Increasingly unpopular and tyrannical, he was deposed and executed by Heraclius.
Heraclian dynasty (610–695)
Heraclius
Ἡράκλειος
5 October 610 –
11 February 641
(30 years, 4 months and 6 days)
Born c. 575 as the eldest son of the Exarch of Africa, Heraclius the Elder. Began a revolt against Phocas in 609 and deposed him in October 610. Brought the Byzantine-Sassanid War of 602–628 to successful conclusion but
was unable to stop the Muslim conquest of Syria. Replaced Latin with Greek as the official language of administration in the East.
[13][c]
Heraclius Constantine
[d]
Ἡράκλειος νέος Κωνσταντῖνος
Heraclius novus Constantinus
11 February –
25 May 641
(3 months and 14 days)
Born on 3 May 612 as the eldest son of Heraclius by his first wife Fabia Eudokia. Named co-emperor on 22 January 613, he succeeded to throne with his younger brother Heraklonas following the death of Heraclius. Died of
tuberculosis, allegedly poisoned by Empress-dowager Martina.
Heraclonas
Ἡρακλεωνᾶς, Heraclius
11 February –
c. 5 November 641
(8 months and 25 days)
Born in 626 to Heraclius' second wife Martina, named co-emperor on 4 July 638. Succeeded to throne with Constantine III following the death of Heraclius. Sole emperor after the death of Constantine III, under the regency of
Martina, but was forced to name Constans II co-emperor by the army, and was deposed by the Senate in September 641 (or early 642).