Murong Huang and his son Murong Jun, who initially claim the Jin Dynasty-created title "Prince of Yan," establish Former Yan, a state of Xianbei ethnicity, in 337.

The Arian leaders, exiled after the Council of Nicaea, have from 325 to the death of Constantine in 337 tried by intrigue to return to their churches and sees and to banish their enemies.

They have been partly successful.

After some months of confusion, the emperor's three surviving sons each adopt the title of Augustus on September 9 and divide the empire among themselves.

Constantius II takes the eastern provinces (Thrace, Macedonia, Greece, Asia, and Egypt) for himself.

Simultaneously, the troops massacre many of his relatives, including Constantine's half-brother, Julius Constantius, consul in 335 and father of the future caesar Gallus and the six-year-old future emperor Julian, who is exiled with the rest of his family to Cappadocia.

(In Julian's 361 Letter to the Athenians, he will openly accuse Constantius of murdering his father.

The historian Eutropius felt the new emperor had “permitted but not ordered” the killings.)

Constantius expands Roman anti-Jewish legislation; Jews are labeled “a pernicious sect”.

Constantine had hoped to be baptized in the Jordan River, but perhaps because of the lack of opportunity to do so—together possibly with the reflection that his office necessarily involves responsibility for actions hardly compatible with the baptized state—he has delayed the ceremony.

It is while preparing for a campaign against Persia that he falls ill at Helenopolis.

When treatment fails, he makes to return to Constantinople, but …

…the emperor is forced to take to his bed near Nicomedia.

Here, Constantine receives baptism, putting off the imperial purple for the white robes of a neophyte; and he dies on May 22, 337.

He is buried at Constantinople in his Church of the Apostles, whose memorials, six on each side, flank his tomb.

This is less an expression of religious megalomania, however, than of Constantine's literal conviction that he was the successor of the evangelists, having devoted his life and office to the spreading of Christianity.

One of his final decrees had been the abolition of crucifixion within the Roman Empire.

The Syro-Christian populations of Mesopotamia and …

The Roman Empire has become Christian, and Christianity has become predominant in Armenia after its king had adopted the Christian faith in 294.

Constans, Constantine’s youngest son, who is sympathetic to the orthodox Christians, takes control of the central prefecture: Italy, Africa, and Illyricum.

Constantine II, at twenty the eldest of Fausta's three sons, retains the West, becoming the ruler of Britain, Gaul, and Spain.

He is sympathetic to the Arian Christians.

Li Shou, cousin to Cheng Han's founding emperor Li Xiong, overthrows Li Xiong's son Li Qi in 338, disassociates himself from Li Xiong's regime by renaming the state from Cheng to Han, and sets up a different imperial ancestral temple.

(Traditional historians did not consider his regime a separate state, however, and treated the succession from Li Xiong to Li Shou's son Li Shi as a single Cheng Han state.)

Constantine had been preparing to go to war against the Persians at the time of his death in 337.

This legacy weighs heavily on the shoulders of Constantius, a military incompetent when compared to the energetic Shapur, with whom Constantius in 338 becomes engaged in what will prove to be a dozen years of inconclusive but extremely bloody warfare.

The Emperor's death in 337 had allowed Athanasius to return to Alexandria, but Constantius renews the order of banishment in 338.