Joannes | EPFL Graph Search

Are you an EPFL student looking for a semester project?

Work with us on data science and visualisation projects, and deploy your project as an app on top of GraphSearch.

Joannes or John (Johannes; died 425) was western Roman emperor from 423 to 425. On the death of the Emperor Honorius (15 August 423), Theodosius II, the remaining ruler of the House of Theodosius, hesitated in announcing his uncle's death. In the interregnum, Honorius's patrician at the time of his death, Castinus, elevated Joannes as emperor. Joannes was a primicerius notariorum or senior civil servant at the time of his elevation. Procopius praised him as "both gentle and well-endowed with sagacity and thoroughly capable of valorous deeds." Unlike the Theodosian emperors, he tolerated all Christian sects and even the pagans. From the beginning, his control over the empire was insecure. In Gaul, his praetorian prefect was slain at Arles in an uprising of the soldiery there. And Bonifacius, comes of the Diocese of Africa, held back the grain fleet destined to Rome. "The events of Johannes' reign are as shadowy as its origins," writes John Matthews, who then provides a list of the ruler's known actions in a single paragraph. Joannes was proclaimed at Rome and praetorian games were provided at the expense of a member of the gens Anicia. Johannes then moved his base of operations to Ravenna, knowing full well that the Eastern Empire would strike from that direction. There is a mention of an expedition against Africa, but its fate, presumed unsuccessful, is unrecorded. In Gaul, he appears to have caused offense by submitting clerics to secular courts. And that is all. Joannes had hoped that he could come to an agreement with the Eastern Emperor, but when Theodosius II elevated the young Valentinian III to caesar (undoubtedly influenced by Valentinian's mother Galla Placidia), he knew he could only expect war. Late in 424, he gave to one of his younger and most promising followers, Aëtius, an important mission. Aëtius, Governor of the Palace at the time, was sent to the Huns, with whom he had lived as a hostage earlier, to seek military help. While Aëtius was away, the army of the Eastern Empire left Thessalonica for Italy, and soon camped in Aquileia.

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Related concepts (6)

Byzantine Empire

The Byzantine Empire, also referred to as the Eastern Roman Empire, was the continuation of the Roman Empire primarily in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinople. It survived the fall of the Western Roman Empire in the 5th century AD and continued to exist until the fall of Constantinople to the Ottoman Empire in 1453. During most of its existence, the empire remained the most powerful economic, cultural, and military force in the Mediterranean world.

Galla Placidia

Galla Placidia (388–89/392–93 – 27 November 450), daughter of the Roman emperor Theodosius I, was a mother, tutor, and advisor to emperor Valentinian III, and a major force in Roman politics for most of her life. She was queen consort to Ataulf, king of the Visigoths from 414 until his death in 415, briefly empress consort to Constantius III in 421, and managed the government administration as a regent during the early reign of Valentinian III, until her death.

Valentinian III

Valentinian III (Placidus Valentinianus; 2 July 419 - 16 March 455) was Roman emperor in the West from 425 to 455. Made emperor in childhood, his reign over the Roman Empire was one of the longest, but was dominated by powerful generals vying for power amid civil wars and the invasions of Late antiquity's Migration Period, including the campaigns of Attila the Hun. He was the son of Galla Placidia and Constantius III, and as the great-grandson of Valentinian I (364-375) he was the last emperor of the Valentinianic dynasty.