However, there is no evidence that his son and ultimate successor, Constantius II, who was an Arian Christian, was exiled.

However, during the time of Arianism's flowering in Constantinople, the Gothic convert Ulfilas ( later the subject of the letter of Auxentius cited above ) was sent as a missionary to the Gothic barbarians across the Danube, a mission favored for political reasons by emperor Constantius II.

He came from Antioch and served under Constantius II and was probably appointed to ensure that nobody with western associations was serving in Britain during a time of mistrust, rebellion and suppression symbolised by the brutal acts of the imperial notary Paulus Catena.

A bust of Emperor Constantius II from Syria. Ammianus was born between 325 and 330 in the Greek-speaking East, possibly at Antioch on the Orontes.

He entered the army at an early age, when Constantius II was emperor of the East, and was sent to serve under Ursicinus, governor of Nisibis in Mesopotamia, and magister militum.

He returned to Italy with Ursicinus, when he was recalled by Constantius, and accompanied him on the expedition against Claudius Silvanus, who had been forced by the allegedly unjust accusations of his enemies into proclaiming himself emperor in Gaul.

Like many ancient historians, Ammianus had a strong political and religious agenda to pursue, however, and he contrasted Constantius II with Julian to the former's constant disadvantage ; like all ancient writers he was skilled in rhetoric, and this shows in his work.

Antipope Felix II was installed as Pope in 355 after the Emperor Constantius II banished the reigning Pope, Liberius, for refusing to subscribe the sentence of condemnation against Saint Athanasius.

In May 357 the Roman laity, which had remained faithful to Liberius, demanded that Constantius, who was on a visit to Rome, should recall Liberius.

He continued to lead the conflict against the Arians for the rest of his life and was engaged in theological and political struggles against the Emperors Constantine the Great and Constantius II and powerful and influential Arian churchmen, led by Eusebius of Nicomedia and others.

The persecution against the orthodox party broke out with renewed vigor, and Constantius II was induced to prepare drastic measures against Athanasius and the priests who were devoted to him.

The Batavi were still mentioned in 355 during the reign of Constantius II ( 317-361 ), when their island was already dominated by the Salii, a Frankish tribe that had sought Roman protection there in 297 after having been expelled from their own country by the Saxons.

Constantius II (; 7 August 317 – 3 November 361 ), was Roman Emperor from 337 to 361.

After the death of Constantine I ( May 337 ), this was the formal division of the Empire, until Dalmatius was killed and his territory divided between Constans and Constantius.

Constantius was born in 317 at Sirmium, Pannonia.

Constantius was made Caesar by his father on 13 November 324.

Before Constantius arrived, the Persian general Narses, who was possibly the king's brother, overran Mesopotamia and captured Amida.

In early 337, Constantius hurried to Constantinople after receiving news that his father was near death.

While Constantius was away from the eastern frontier in early 337, Shapur assembled a large army, including war elephants, and launched an attack on Roman territory, laying waste to Mesopotamia and putting Nisibis under siege.

Ultimately, Constantius was able to push back the invasion, Shapur failing to make any significant gains.

This new state of affairs was unacceptable to Constantius, who felt that as the only surviving son of Constantine the Great, the position of emperor was his alone.

Flavius Claudius Julianus, born in May or June 332 or 331 in Constantinople, was the son of Julius Constantius ( consul in 335 ), half brother of Emperor Constantine I, and his second wife, Basilina, a woman of Greek origin.

His mother was an Arian, sister of Clearchus, also an Arian, and a paternal granddaughter of Gallus ( born c. 370 ), son of Anastasia ( born c. 352 ) and husband, in turn daughter of Flavius Claudius Constantius Gallus and wife and cousin Constantina.

Valentinian was born in the western capital of Ravenna, the only son of Galla Placidia and Flavius Constantius.

Theodora, the wife of Constantius Chlorus, is often called Maximian's stepdaughter by ancient sources, leading to claims by Otto Seeck and Ernest Stein that she was born from an earlier marriage between Eutropia and Afranius Hannibalianus .< ref > Aurelius Victor, de Caesaribus 39. 25 ; Eutropius, Breviaria 9. 22 ; Jerome, Chronicle 225 < sup > g </ sup >; Epitome de Caesaribus 39. 2, 40. 12, quoted in Barnes, New Empire, 33 ; Barnes, New Empire, 33 .</ ref > Barnes challenges this view, saying that all " stepdaughter " sources derive their information from the partially unreliable work of history Kaisergeschichte, while other, more reliable sources, refer to her as Maximian's natural daughter .< ref > Origo Constantini 2 ; Philostorgius, Historia Ecclesiastica 2. 16 < sup > a </ sup >, quoted in Barnes, New Empire, 33.

Likewise, ten Roman Emperors were born in or near this city, Emperors Herennius Etruscus ( 251 ), Hostilian ( 251 ), Decius Traian ( 249-251 ), Claudius II ( 268-270 ), Quintillus ( 270 ), Aurelian ( 270-275 ), Probus ( 276-282 ), Maximianus Herculius ( 285-310 ), Constantius II ( 337-361 ) and Gratian ( 367-383 ).

* Constantius II, Roman emperor ( 337-361 ), born in Sirmium.

Ten Roman Emperors were born in this city or in its surroundings: Herennius Etruscus ( 227-251 ), Hostilian ( 230 ?- 251 ), Decius Traian ( 249-251 ), Claudius II ( 268-270 ), Quintillus ( 270 ), Aurelian ( 270-275 ), Probus ( 276-282 ), Maximianus Herculius ( 285-310 ), Constantius II ( 337-361 ) and Gratian ( 367-383 ).

Constantius was born in 317 at Sirmium, Pannonia.

* Constantius II, Roman emperor ( 337-361 ), born in Sirmium.

Julius Constantius was born after 289, the son of Constantius Chlorus and his wife Theodora, adoptive daughter of emperor Maximian.

Six Roman Emperors were born in this city or in its surroundings: Decius Traian ( 249 – 251 ), Aurelian ( 270 – 275 ), Probus ( 276 – 282 ), Maximianus Herculius ( 285 – 310 ), Constantius II ( 337 – 361 ) and Gratian ( 367 – 383 ).

* December 25 – Vetranio meets Constantius II at Naissus ( Serbia ) and assembled the troops.

The city was among several taken in the Roman conquest in 75 BC ; the Romans built the Via Militaris in the 1st century, with Naissus being one of its key towns ; it is also the birthplace of Constantine the Great, the first Christian Emperor and the founder of Constantinople, and Constantius III and Justin I.

The Historia Augusta says Constantius I was the son of Eutropius, a noble from northern Dardania in modern Serbia, and Claudia, a niece of the emperors Claudius II and Quintillus.

In 348, to escape religious persecution by a Gothic chief, probably Athanaric he obtained permission from Constantius II to migrate with his flock of converts to Moesia and settle near Nicopolis ad Istrum in modern northern Bulgaria.

Constantius remained in Britannia for a few months, replaced most of Allectus ’ officers, and the British provinces were probably at this time subdivided along the lines of Diocletian ’ s other administrative reforms of the Empire.

In 304, Maximian met up with Galerius, probably to discuss the succession issue and Constantius either was not invited or could not make it due to the situation on the Rhine.

Constantius was either married to, or was in concubinage with, Helena, who was probably from Nicomedia in Asia Minor.

After electing Magnus Decentius ( probably his brother ) to Caesar and gathering as many troops as possible, the armies of Magnentius and Constantius met in the Battle of Mursa Major in 351 ; Magnentius led his troops into battle, while Constantius spent the day of battle praying in a nearby church.

Sozomen wrote that his grandfather lived at Bethelia, near Gaza, and became a Christian together with his household, probably under Constantius II.

It was probably created as part of the administrative reforms of the Roman Emperor Diocletian after the defeat of the usurper Allectus by Constantius Chlorus in 296 AD.

Britannia Secunda was one of the provinces of Roman Britain in existence by c. 312 AD and probably created as part of the administrative reforms of the Roman Emperor Diocletian after the defeat of the usurper Allectus by Constantius Chlorus in 296 AD.

Eumenius probably took his place, for it was from Autun that he went to be magister memoriae ( private secretary ) to Constantius Chlorus, whom he accompanied on several of his campaigns.

Justina's mother was probably a daughter of Julius Constantius and his first wife, the aforementioned Galla.