Heros was Bishop of Arles from 408 to 412. He was installed as bishop by the usurper Constantine III, and was deposed by Constantius III

Constantius III

Flavius Constantius , commonly known as Constantius III, was Western Roman Emperor for seven months in 421. A prominent general and politician, 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.- Early life and rise to...

.

Prosper of Aquitaine

Prosper of Aquitaine

Saint Prosper of Aquitaine , a Christian writer and disciple of Saint Augustine of Hippo, was the first continuator of Jerome's Universal Chronicle.- Life :...

 describes him in his Chronicle as "vir sanctus, et beati Martini

Martin of Tours

Martin of Tours was a Bishop of Tours whose shrine became a famous stopping-point for pilgrims on the road to Santiago de Compostela. Around his name much legendary material accrued, and he has become one of the most familiar and recognizable Christian saints...

 discipulus". He was installed as bishop in the face of local opposition. Heros lost his see in the reprisals which followed the defeat and execution of Constantine III, and was replaced by Patroclus of Arles.

Along with Lazarus

Lazarus of Aix

Saint Lazarus of Aix was the first verifiable bishop of Aix-en-Provence, in France. He was appointed to his bishopric by the usurper emperor Constantine III in 408, and stripped of his office after Constantine was deposed by the future Constantius II in 411...

, who had also been deposed as bishop of Aix-en-Provence

Aix-en-Provence

Aix , or Aix-en-Provence to distinguish it from other cities built over hot springs, is a city-commune in southern France, some north of Marseille. It is in the region of Provence-Alpes-Côte d'Azur, in the département of Bouches-du-Rhône, of which it is a subprefecture. The population of Aix is...

 by Constantius, he went into exile in Palestine

Palestine

Palestine is a conventional name, among others, used to describe the geographic region between the Mediterranean Sea and the Jordan River, and various adjoining lands....

. In 415 both Heros and Lazarus wrote a letter to the Council of Diospolis condemning Pelagianism

Pelagianism

Pelagianism is a theological theory named after Pelagius , although he denied, at least at some point in his life, many of the doctrines associated with his name. It is the belief that original sin did not taint human nature and that mortal will is still capable of choosing good or evil without...

; they wrote a second letter together to the Council of Carthage in 416.