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Constans
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Constans
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Flavius Julius Constans (c. 323 – 350), also called Constans I, was Roman emperor from 337 to 350. He held the imperial rank of caesar from 333, and was the youngest son of Constantine the Great.

Key Information

After his father's death, he was made augustus alongside his brothers in September 337. Constans was given the administration of the praetorian prefectures of Italy, Illyricum, and Africa.[4] He defeated the Sarmatians in a campaign shortly afterwards.[4] Quarrels over the sharing of power led to a civil war with his eldest brother and co-emperor Constantine II, who invaded Italy in 340 and was killed in battle by Constans's forces near Aquileia.[4] Constans gained from him the praetorian prefecture of Gaul.[4] Thereafter there were tensions with his remaining brother and co-augustus Constantius II (r. 337–361), including over the exiled bishop Athanasius of Alexandria,[4] who in turn eulogized Constans as "the most pious Augustus... of blessed and everlasting memory."[5] In the following years he campaigned against the Franks, and in 343 he visited Roman Britain,[4] the last legitimate emperor to do so [6] until Manuel II in 1400,[7] more than a thousand years later.

In January 350, Magnentius (r. 350–353) the commander of the Jovians and Herculians, a corps in the Roman army, was acclaimed augustus at Augustodunum (Autun) with the support of Marcellinus, the comes rei privatae.[8] Magnentius overthrew and killed Constans.[4][8] Surviving sources, possibly influenced by the propaganda of Magnentius's faction,[9] accuse Constans of misrule and of homosexuality.[4]

Early life

[edit]

Sources variously report Constans' age at the time of his death as 27 or 30, meaning he was born in either 320 or 323.[3] Timothy Barnes, observing numismatic evidence, considered the younger age to be more likely.[10] He was the third and youngest son of Constantine I and Fausta.[11] According to the works of both Ausonius and Libanius, he was educated at Constantinople under the tutelage of the poet Aemilius Magnus Arborius, who instructed him in Latin.[3]

On 25 December 333, Constans was elevated to the imperial rank of caesar at Constantinople by his father.[3] Prior to 337, Constans became engaged to Olympias, the daughter of the praetorian prefect Ablabius, although the two never actually married.[11]

Reign

[edit]
Possible head of Constans from around his proclamation as augustus.[12][13]
Solidus of Constans marked: constans augustus.

After Constantine's death, Constans and his two brothers, Constantine II and Constantius II were proclaimed augusti and divided the Roman empire among themselves on 9 September 337.[3] Constans was left with Italy, Africa and Illyricum.[14] In 338, he campaigned against the Sarmatians.[15]

Meanwhile, Constans came into conflict with his eldest brother Constantine II over the latter's presumed authority over Constans' territory. After attempting to issue legislation to Africa in 339, which was part of Constans' realm, Constantine led his army into an invasion of Italy only a year later. However, he was ambushed and killed by Constans' troops, and Constans then took control of his brother's territories.[15]

Gold medallion of Constans, equivalent to 9 solidi. Aquileia, 342 AD – Bode Museum

Constans began his reign in an energetic fashion.[16][17] From 341 to 342, he led a campaign against the Franks where, after an initial setback,[18] the military operation concluded with a victory and a favorable peace treaty.[19] Eutropius wrote that he "had performed many gallant actions in the field, and had made himself feared by the army through the whole course of his life, though without exercising any extraordinary severity,"[20] while Ammianus Marcellinus remarked that Julian was the only person the Alamanni feared after the death of Constans.[19]

In the early months of 343, he visited Britain, an event celebrated enough for Libanius to dedicate several sections of his panegyric to explaining it.[19] Although the reasons for the visit remain unclear,[21] the ancient writers were primarily interested in Constans' precarious journey to the province, rather than his actions within it.[19] One theory considers it to have involved the northern frontier, based on Ammianus' remark that he had discussed the Areani in his now-lost coverage of Constans' reign. Additionally, after recording attacks "near the frontiers" in 360, the historian wrote that the Alamanni were too much of a threat for Julian to confront the problem, in contrast to what Constans was able to do.[21]

Constans was accused of employing corrupt ministers during his reign, due to his purported personal greed.[22][23][24] One example included the magister officiorum (master of the offices) Flavius Eugenius, who remained in his position throughout most of the 340s.[25] Despite Eugenius being alleged to have misused his power to seize property,[25] the emperor continued to support him, his trust going as far as to honor him with a statue in the Forum of Trajan in Rome.[26]

Solidus of Constans marked: constans p·f· augustus on the obverse, with the emperor holding a vexillum with a chi-rho and crowned by Victory on the reverse, marked: spes rei publicae ("the hope of the Republic")

Religion

[edit]

Constans issued an edict banning superstition and pagan sacrifices in 341,[27] his justification being that he was following the precedent set by his father.[28] Only a short while later though, he tried to moderate his stance by legislating against the destruction of temple buildings.[29]

Constans' support of Nicene orthodoxy and the bishop Athanasius of Alexandria brought him into conflict with his brother Constantius. Although the two emperors called the Council of Serdica in 343 to settle the conflict, it was a complete failure,[30] and by 345 Constans was outright threatening civil war against his brother.[31] Eventually, Constantius agreed to allow Athanasius to return to his position, as the bishop's replacement had recently died.[32] Constans also used the military to suppress Donatism in Africa, where the church was split between Donatists and Catholics.[32]

Alleged homosexuality

[edit]

Unlike Constantius,[33] Constans was targeted with gossip over his personal life.[34] Numerous sources suspected him of homosexuality,[24] presumably based on the fact that he never married.[23] Aurelius Victor charged Constans with "rabid"[22] pederasty towards young barbarian hostages,[34] though Hunt remarked that "the allegation that he kept a coterie of captive barbarians to gratify his homosexual tastes sounds more like hostile folklore."[35] Constans' legislation against homosexuality has been cited to dispute the rumor.[35][36]

Death

[edit]
Solidus of Constans, Decennalia issue of 347/348

On 18 January 350,[37] the general Magnentius declared himself emperor at Augustodunum (Autun) with the support of a number of court officials such as Marcellinus, Constans' comes rerum privatarum, as well as Fabius Titianus, who had previously served as the praetorian prefect of Gaul.[35] At the time, Constans was distracted by a hunting trip.[38] As he was trying to reach Hispania, supporters of Magnentius cornered him in a fortification in Helena (Elne) in the eastern Pyrenees of southwestern Gaul, where he was killed after seeking sanctuary in a temple.[11][a] An alleged prophecy at his birth had said Constans would die "in the arms of his grandmother". His place of death happens to have been named after Helena, mother of Constantine and his own grandmother, thus realizing the prophecy.[41] Constans' name would later be erased from inscriptions in places that recognized Magnentius as emperor.[42]

Regarding possible motives for Constans' overthrow, ancient sources assert that he was widely unpopular,[22][35][43] and attribute his downfall to his own failings. Along with the accusation of corruption, he is also accused of neglecting portions of the empire[35] and treating his soldiers with contempt.[23][16] Ammianus lamented the emperor's failure to listen to wise counsel,[35] referencing one man he believed could have saved Constans from his own faults.[24]

However, some modern scholars have questioned this portrayal. According to historian Jill Harries, "The detail that Constans was in the habit of making journeys with only a small escort may account for his vulnerability in 350."[23] Based on several factors - the small number of people behind the plot, how the setting for Magnentius' coup was not a military centre,[38] Vetranio's proclamation as emperor in opposition to Magnentius,[44] and Julian's report that the usurper had to murder several of Constans' generals to take control of the Gallic army[45] – she concluded that Magnentius' revolt was "the result of a private grudge on the part of an apprehensive official and not the outcome of widespread discontent among the military or the wider population."[46] This view is supported by Peter Crawford, who considered the explanation from the ancient sources to be a misconception caused by the rapid success of the coup.[47]

Harries does, however, acknowledge how the Gallic army accepted Magnentius seemingly without difficulty, and how according to Zosimus, Constantius' official Philippus emphasized Constantine, rather than Constans, when addressing Magnentius' troops.[48] On speculating the basis for Constans' overthrow, she suggested that one reason may have been regarding financial difficulties in Gaul by the end of his reign, which could have been related to the finance officer Marcellinus' support of him.[45] After Magnentius took power, he levied taxes, sold imperial estates in Gaul and debased the coinage.[49] Nicholas Baker-Brian also observed how Magnentius sent his brother Decentius to defend the region after Constans had neglected it, writing that, "it is apparent that among the reasons for Magnentius' rebellion was a desire to remedy Constans' governmental failings in Gaul."[50]

Family tree

[edit]
See also: Constantinian dynasty


Family of Constans

Emperors are shown with a rounded-corner border with their dates as Augusti, names with a thicker border appear in both sections

1: Constantine's parents and half-siblings

Helena
Flavia Maximiana Theodora
  • Constantine I
  • 306–337
Flavius DalmatiusHannibalianusFlavia Julia Constantia
AnastasiaBassianus
GallaJulius ConstantiusBasilinaLicinius IIEutropiaVirius Nepotianus
HannibalianusConstantinaConstantius Gallus
HelenaNepotianus


2: Constantine's children

Minervina
  • Constantine I
  • 306–337
Fausta
Crispus
  • Constans
  • 337–350
HannibalianusConstantinaConstantius Gallus
Faustina
Helena
Constantia

See also

[edit]

Notes

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References

[edit]

Sources

[edit]

Primary sources

[edit]

Secondary sources

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Constans

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Flavius Julius Constans (c. 320 – 18 January 350) was a Roman emperor who ruled from 337 to 350, the youngest of Constantine the Great's three sons by Fausta, governing initially the central provinces encompassing Italy, Africa, Illyricum, Macedonia, and Greece. Proclaimed Caesar by his father in 333 and elevated to Augustus following Constantine's death in 337 amid a purge of imperial kin, Constans consolidated power by defeating and absorbing the territories of his elder brother Constantine II after the latter's fatal invasion of Italy in 340 near Aquileia. His reign featured military successes, including campaigns against the Sarmatians shortly after 337 and the Franks in 341–342, as well as a visit to Britain in 343 likely to address frontier threats.
An adherent to Nicene orthodoxy inherited from his father, Constans collaborated with Constantius II to prohibit pagan sacrifices in 341 and convened the Council of Serdica to affirm anti-Arian positions, while suppressing groups such as Donatists, pagans, and Jews. Despite these efforts to enforce Christian unity, his rule drew criticism for alleged favoritism toward low-born associates, corruption in selling offices, and personal conduct that alienated the military, culminating in his overthrow by the usurper Magnentius in 350. Fleeing toward Spain, Constans was intercepted and executed by Magnentius' agents at Helena in the Pyrenees, ending his brief but turbulent tenure amid fraternal power struggles that fragmented the empire.

Early Life

Birth and Family

Flavius Julius Constans was born circa 323, as the third and youngest son of Roman Emperor Constantine I (r. 306–337) and his second wife, Flavia Maxima Fausta, whom Constantine had married in 307 after the death of his first wife, . The precise date and location of his birth remain uncertain in surviving records, though some accounts place it in or near (Augusta Treverorum), where Constantine maintained a residence during campaigns in . Constans' immediate family included two full brothers: Constantine II (born 316), the eldest, who would succeed as emperor in the western provinces, and (born 317), the middle son, allocated the eastern territories upon their father's death. He also had an older half-brother, (born c. 305 to ), whom Constantine elevated to Caesar in 317 but executed in 326 amid allegations of treason and adultery involving , leading to Fausta's own death by suffocation in a shortly thereafter. These events, documented in sources like and Zosimus, underscore the internal tensions within the during Constans' early years, though primary accounts vary in attributing motives and reliability. No records indicate that Constans married or produced legitimate heirs during his lifetime, distinguishing him from his brothers, both of whom had children who later contended for imperial power.

Education and Early Honors

Constans, born circa 320 AD as the youngest son of Emperor Constantine I and , received his early education at the imperial court in , the emerging eastern capital favored by his father for administrative and cultural training of the royal family. His tutors included the Gallo-Roman poet and rhetorician Aemilius Magnus Arborius, from whom he studied , poetry, and classical literature, reflecting the standard curriculum for imperial heirs that emphasized , , and administrative preparation alongside military discipline. This court-based education, conducted amid Constantine's consolidation of power and Christianization efforts, positioned Constans for rapid advancement, though contemporary sources provide limited specifics beyond the elite, multilingual environment typical of late Roman princely upbringing. On December 25, 333 AD, at around age ten or eleven, Constans was proclaimed nobilissimus Caesar by Constantine I in , an honor that granted him junior imperial status and oversight of Illyricum, signaling his father's strategy to secure dynastic continuity through collegiate rule. This appointment, commemorated on coinage depicting the young Caesar in military attire, preceded similar elevations of his brothers and underscored Constans' early recognition as a viable successor, despite his .

Rise to Power

Appointment as Caesar

Flavius Julius Constans, the youngest son of Emperor Constantine I and his second wife , was born around 323. On 25 December 333, Constantine elevated the approximately ten-year-old Constans to the rank of Caesar during a ceremony in . This completed the appointments of Constantine's three surviving sons to the position—Constantine II having been named Caesar on 1 March 317 and on 8 November 324—solidifying a dynastic succession plan amid Constantine's sole rule following his victory over in 324. The elevation associated Constans directly with imperial authority, granting him the title nobilissimus Caesar and symbolic responsibilities, though substantive power remained centralized under his father. Constans was assigned oversight of the , the central dioceses including , , and adjacent territories, positioning him between the western holdings of Constantine II and the eastern domains of . This territorial allocation reflected Constantine's strategy to balance familial influence across the empire's core regions while maintaining personal control until his death. Contemporary accounts noted an ominous portent during the ceremony—a reported "fire in the sky"—interpreted by some as foreshadowing instability in the imperial house, though such omens were common in Roman imperial elevations.

Succession Upon Constantine's Death

Constantine the Great died on 22 May 337 in Nicomedia, leaving the Roman Empire to his three surviving sons: Constantine II, Constantius II, and Constans, who were promptly proclaimed Augusti by the imperial armies. The brothers, having been designated Caesares by their father in prior years—Constans specifically on 25 December 333—rapidly asserted joint rule without a designated senior emperor, diverging from Constantine's earlier tetrarchic influences. This proclamation occurred amid uncertainty, as Constantine had recently elevated his nephew Dalmatius to Caesar and another relative, Hannibalianus, to Rex Regum, potentially complicating the line of succession. In the ensuing months, the brothers convened at in during the summer of 337 to formalize the division of the empire and neutralize threats. They orchestrated the execution of several male relatives, including their uncles Flavius Dalmatius and Flavius , the Caesar Dalmatius, Hannibalianus, and possibly up to a dozen other kin, in a aimed at consolidating power and eliminating rival claimants; numismatic evidence from mints like , , and Siscia indicates the sons' deliberate marginalization of Dalmatius' brief elevation by halting or altering coin production in his honor. Constans, the youngest at approximately 14–17 years old, participated in these decisions alongside his elder brothers, though ancient sources attribute the initiative primarily to collective fraternal action rather than individual agency. The empire was partitioned into three spheres of influence: Constantine II received the western prefectures of , , and ; Constans was allocated , , Illyricum, and the Danubian provinces including and Macedonia; Constantius II controlled the eastern territories encompassing , Asia Minor, , and . This tripartite division, while initially stable, sowed seeds of future conflict due to overlapping claims and the disproportionate shares—Constantine II's portion being the most militarily demanding yet smallest in revenue—reflecting pragmatic allocation based on prior Caesar responsibilities rather than equal merit. Constans' junior status did not preclude his effective control over his assigned regions, setting the stage for his administration of the central and southern West.

Reign

Division of the Empire and Fraternal Conflicts

Following the death of Constantine I on May 22, 337, the Roman army proclaimed his three surviving sons—Constantine II, Constantius II, and Constans—as co-Augusti, overriding Constantine's prior designations of only the eldest two as Caesars and plans for other heirs like Dalmatius. In the ensuing power consolidation, the brothers ordered the execution of potential rivals, including half-brother Dalmatius and nephew Hannibalianus, by September 337, securing their exclusive rule. The empire was then partitioned geographically: Constantine II, as the eldest, received the praetorian prefecture of Gaul, encompassing Britain, Gaul proper, and Hispania; Constantius II took the eastern prefecture, including Thrace, Asia Minor, Syria, and Egypt; Constans, the youngest, was allocated the central regions under the prefecture of Italy, comprising Italy, Africa, Illyricum (Pannonia, Dacia, Macedonia, and Achaea), and Dalmatia. Tensions arose immediately due to perceived imbalances, with Constantine II viewing his western assignment as insufficient for his seniority and eyeing expansion into Constans' richer central territories, particularly Illyricum's military resources. In early 340, Constantine II launched an invasion of to challenge Constans' control, advancing with forces from but encountering stiff resistance. His army was ambushed and decisively defeated near Aquileia, where Constantine II perished in the engagement, leaving no heirs to contest the outcome. With Constantine II's demise, Constans annexed his brother's western provinces without opposition, extending his domain from and through to his original central holdings, thus consolidating rule over the entire western empire while retained the east. This redistribution averted immediate further between the surviving brothers, who maintained a pragmatic alliance against external threats, though underlying rivalries persisted amid administrative strains and differing religious policies. No major conflicts erupted between Constans and prior to Constans' overthrow in 350.

Military Campaigns and Frontier Defense

Following the death of Constantine I in 337, Constans participated in early military actions to secure the empire's frontiers, including a successful campaign against the along the . This effort, likely coordinated with his brothers, aimed to stabilize the Illyrian and Pannonian regions against nomadic incursions. In 340, Constans' forces decisively defeated his brother Constantine II near Aquileia during a civil conflict over territorial division, leading to Constantine II's death and Constans' assumption of control over , , and . This victory consolidated western command, enabling redirected resources toward external threats. Constans launched campaigns against the along the frontier in 341 and 342, achieving successes that reinforced Roman defenses in . The second campaign resulted in a clear imperial triumph, commemorated in contemporary artifacts, deterring further Germanic raids. In early 343, Constans visited , crossing the Channel in winter with a small escort of approximately 100 men, probably to address frontier instability from Pictish or Scottish incursions. He issued legislation at Bononia on January 25 and returned to by June 30, with his presence likely quelling unrest without a recorded major battle. This marked the final imperial visit to the province, underscoring efforts to maintain the northern defenses amid strained resources. These operations reflect Constans' focus on proactive frontier defense, leveraging mobile field armies to counter barbarian pressures on the , , and British perimeters, though primary accounts remain limited and reliant on later historians like .

Administrative Governance

Upon Constantine the Great's death in 337 AD, Constans received administrative control over the praetorian prefectures of , , and Illyricum, encompassing key western territories including and major dioceses such as Macedonia and . This division maintained the empire's centralized bureaucratic framework inherited from his father, with praetorian prefects overseeing civil administration, taxation, and provincial governance separate from military commands. Following the defeat and death of his brother Constantine II in 340 AD, Constans expanded his authority to include , , and , solidifying a western imperial domain administered through modular regional prefectures to enhance efficiency amid fraternal divisions. Constans relied on a cadre of praetorian prefects to manage these regions, appointing figures such as Aconius Catullinus ( and , 341–342 AD), Furius Placidus ( and , 342–346 AD), and Fabius Titianus (, 341–350 AD), who handled fiscal collection, judicial oversight, and infrastructure maintenance. These officials operated with significant autonomy within their prefectures, reflecting a devolved yet coordinated system where mobility between eastern and western courts—evident in prefects like Vulcacius Rufinus (/ to Illyricum, 346–349 AD)—preserved bureaucratic continuity and prevented regional isolation. Urban prefects in , such as Fabius Titianus (339–341 AD) and Ulpius Limenius (347–349 AD, concurrently praetorian prefect), enforced local , including grain supply and public order, under Constans' direct authority. Early in his reign, Constans co-issued edicts with , such as the directive to Philip on protecting senators' dispersed provincial properties from arbitrary seizure, underscoring efforts to stabilize elite landholdings amid post-succession uncertainties. In 340 AD, he promulgated CTh 11.12.1 revoking certain clerical privileges to realign administrative burdens, and by 346 AD, from , CTh 11.1.6 endorsed fiscal statutes for Italian landowners, demonstrating legislative adaptation to regional economic needs without overhauling Constantine's separation of civil and military hierarchies. Consulships, like the joint 346 AD pairing with (though Constans later declined recognition), facilitated inter-court coordination on appointments, balancing autonomy with imperial collegiality. This governance model prioritized fiscal stability and provincial loyalty through prefectural delegation, yet vulnerabilities emerged, as senior officials like Titianus later backed ' 350 AD usurpation, exploiting administrative networks for . No sweeping bureaucratic expansions occurred under Constans, who instead sustained the tetrarchic-patristic system of dioceses and vicars, with approximately 100 provinces grouped under prefects to manage taxation and defense logistics efficiently.

Religious Policies and Orthodoxy

Constans, ruling the western provinces from 337 to 350, adhered to the Nicene formulation of Christian doctrine established at the Council of Nicaea in 325, positioning himself as a defender of orthodoxy against Arian tendencies prevalent in the East. Unlike his brother , who favored semi-Arian compromises, Constans aligned with Western bishops upholding the full divinity of Christ as homoousios with the Father, actively intervening to protect exiled Nicene leaders such as . This stance reflected a commitment to imperial oversight of ecclesiastical unity, continuing Constantine I's legacy of favoring conciliar resolutions while privileging the Nicene Creed's Trinitarian orthodoxy. In a letter to around 341, Constans advocated for the restoration of Athanasius and Paul of , asserting after personal investigation that their exiles stemmed from piety rather than sedition, and urging his brother to convene a council for reconciliation under orthodox principles. This correspondence underscored Constans' proactive role in bridging East-West divides, emphasizing that harmony required adherence to Nicaea's decisions and the reinstatement of persecuted bishops. His support extended to practical measures, including sheltering Athanasius in the West after the latter's repeated Eastern banishments, thereby bolstering Nicene networks against Arian encroachments. Constans co-convened the Council of Sardica in 343 with Constantius II, at the urging of Pope Julius I, aiming to adjudicate Athanasius' case and affirm Nicene orthodoxy amid ongoing Arian challenges. The assembly, dominated by Western bishops, deposed over 100 Eastern prelates sympathetic to Arianism, including Eusebius of Nicomedia, and issued 20 canons reinforcing episcopal authority, appellate rights to the Roman see, and condemnation of doctrines subordinating the Son to the Father. Though Eastern delegates withdrew to Philippopolis and endorsed a rival synod favoring Arian-leaning views, Constans endorsed Sardica's outcomes, which facilitated Athanasius' temporary return to Alexandria in 346 and reinforced Western resistance to imperial interference in doctrinal matters unless aligned with Nicaea. Beyond Trinitarian disputes, Constans addressed schisms like in through coercive measures, deploying military force alongside Constantine I's earlier efforts to compel unity under Catholic bishops, viewing persistent as a threat to imperial stability and orthodox cohesion. His policies maintained restrictions on pagan practices inherited from his father, prohibiting sacrifices and temple rituals in line with progressive Christianization, though enforcement in the West remained pragmatic rather than systematically eradicationist. This approach prioritized as a unifying imperial tool, subordinating to the Nicene framework while leveraging state authority to suppress deviations.

Legislative Measures

During his reign, Constans, often in conjunction with his brother , promulgated several constitutions aimed at reinforcing Christian orthodoxy and curtailing non-Christian practices. In 341, the brothers issued an edict prohibiting pagan sacrifices and superstitious rituals across their territories, declaring that "superstition must cease" and the "madness of sacrifices be abolished," with penalties for violations including fines for officials who failed to enforce it. This measure built on Constantine I's earlier restrictions, marking a step toward systematic suppression of public pagan worship in the Western provinces under Constans' control. In 339, Constans and Constantius enacted laws targeting Jewish and ownership of non-Jewish slaves. One mandated the of Christian slaves held by and imposed on who circumcised non-Jewish slaves or converted Christians, reflecting concerns over religious boundaries and the protection of Christian communities from perceived coercion. A related addressed Jewish influence on Christian women in trades, allowing their return to Christian and threatening death for Jewish proselytizers, thereby prioritizing ecclesiastical authority over ethnic or religious intermingling. Further privileges were granted in 342, when the brothers exempted underage sons of from compulsory public services, ensuring the continuity of the Christian amid demands for civic burdens. That same year, they issued the empire's first explicit prohibition on same-sex unions, condemning marriages between persons of the same sex and prescribing severe penalties, including burning, to uphold traditional Roman familial and moral norms aligned with emerging Christian doctrine. These measures collectively advanced the integration of imperial with , though enforcement varied by region and faced resistance from pagan elites.

Personal Conduct Allegations

Ancient historians leveled several accusations against Constans regarding his personal conduct, portraying him as morally corrupt and tyrannical. Sextus Aurelius Victor, in his De Caesaribus, claimed that Constans developed an infatuation with handsome boys (puerorum pulchritudine captus), particularly young and attractive barbarian hostages whom he allowed to abuse and plunder Roman subjects without restraint, fostering widespread resentment among the populace and soldiery. This allegation contributed to depictions of Constans as arrogant following his victory over Constantine II in 340, exacerbating his unpopularity. Eutropius, in his Breviarium ab Urbe Condita, described Constans' early reign as energetic and just but noted that ill health and poor advisors led him to indulge in "great vices" (gravia vitia) and military indolence, implying severe moral lapses without specifying details. Zosimus echoed themes of favoritism toward barbarians in his New History, accusing Constans of employing barbarian troops who exercised unchecked cruelty against Roman subjects, exceeding tolerable tyranny and prioritizing personal indulgences over governance. These reports, primarily from pagan or non-contemporary authors writing after Constans' overthrow in 350, reflect potential biases against the and Christian rulers, as Victor and Zosimus critiqued imperial favoritism toward barbarians and deviation from traditional Roman virtues; no direct evidence from Constans' lifetime corroborates the sexual allegations, which may have served to justify his . Broader claims of , such as selling offices and for troops, appear in multiple accounts but align with patterns of posthumous vilification common in late .

Death and Overthrow

Betrayal and Assassination

In January 350, amid growing discontent in the Gallic army over Constans' perceived neglect of frontier duties and favoritism toward his guards at the expense of frontier legions, the comes rei militaris Magnus —a Frank by birth and senior officer of the imperial guard—was proclaimed emperor by troops at Augustodunum (modern ) on 18 January. Magnentius rapidly secured allegiance across the western provinces, including Italia, , and , by promising reforms and leveraging anti-Constantinian sentiment. Constans, wintering in Hispania at the time, learned of the revolt at Caesaraugusta (modern ) and fled eastward toward loyalist strongholds, but his flight was marked by betrayal from within his entourage, including the Viventius who abandoned him. Pursued by ' agents, Constans sought refuge in the fortified post of Vicus Helena (near modern Loucrup in the ), where he was overtaken and slain by Gaiso, a dispatched by the usurper, reportedly uttering words interpreted as fulfilling a birth of dying amid Latin speakers. His , dated to late January or early February 350, ended the junior branch of the in the west, leaving as the sole legitimate emperor.

Immediate Aftermath

, a Frankish commander of the , was proclaimed emperor by troops loyal to him at on 18 January 350, initiating a revolt against Constans that led to the emperor's flight southward and assassination by ' agents in the region shortly thereafter. By mid-February, had secured control over the western provinces of , , , and , systematically eliminating Constans' praetorian officials and other supporters to consolidate his rule. The power vacuum prompted further unrest: on 1 March 350, , the per Illyricum, was acclaimed emperor by legions along the frontier, possibly encouraged by Constantius II's sister to stabilize the region amid Persian threats in the East. In , resistance to manifested when Constantine's nephew entered on 3 June 350 at the head of gladiators and urban supporters, proclaiming himself emperor in a bid to restore Constantinian legitimacy; his brief 28-day hold on the city ended with his capture and execution by Magnentius' Pompeius Ursulus, who also massacred 300 alleged accomplices. Constantius II, informed of Constans' death while campaigning near Antioch in late winter 350, prioritized eastern defenses against [Shapur II](/page/Shapur II) before mobilizing against the western usurper, initially acknowledging Vetranio's position but compelling his abdication on 25 350 after diplomatic pressure and military posturing. Magnentius, in turn, elevated his brother Decentius as Caesar by winter 350/351 to administer the frontier, setting the stage for prolonged civil conflict.

References

  1. https://roman-emperors.sites.luc.edu/consi.htm
  2. https://imperiumromanum.pl/en/biographies/constans/
  3. https://historycooperative.org/constans/
  4. https://www.britannica.com/biography/Constans-I
  5. https://www.britishmuseum.org/collection/term/BIOG140660
  6. https://roman-empire.net/collapse/constans
  7. https://totallyhistory.com/constans-i/
  8. https://history-of-the-world.fandom.com/wiki/Emperor_Constans
  9. https://www.vcoins.com/en/stores/marc_breitsprecher_classical_numismatist/8/product/constans_as_caesar_ad_333337_1983__soldiers/2239382/Default.aspx
  10. https://roman-emperors.sites.luc.edu/fausta.htm
  11. https://roman-emperors.sites.luc.edu/conniei.htm
  12. https://about-history.com/roman-emperor-constans-337-350/
  13. https://www.forumancientcoins.com/historia/roman_6a.htm
  14. https://www.academia.edu/7070181/Numismatic_Evidence_and_the_Succession_to_Constantine_I
  15. https://academic.oup.com/book/57948
  16. https://www.thecollector.com/successors-constantine-the-great/
  17. https://phersu-atlas.com/chronology/event5211.html
  18. https://www.livius.org/articles/person/constantius-ii/
  19. https://orca.cardiff.ac.uk/id/eprint/129916/1/2020lewiswphd.pdf
  20. https://www.jstor.org/stable/20181025
  21. https://www.academia.edu/4164539/Constantine_and_the_Northern_Barbarians
  22. https://classicalassociationni.wordpress.com/2021/10/03/the-last-roman-emperor-to-campaign-in-britain/
  23. https://www.uwyo.edu/lawlib/blume-justinian/ajc-edition-2/books/book12/Book12-1rev.pdf
  24. https://www.ebsco.com/research-starters/history/constans-i
  25. https://www.britannica.com/event/Council-of-Sardica
  26. https://www.fourthcentury.com/letter-from-constans-to-constantius/
  27. https://www.catholic.com/encyclopedia/council-of-sardica
  28. https://www.fourthcentury.com/council-of-serdica-ad-343/
  29. https://www.fourthcentury.com/imperial-laws-and-letters-involving-religion-ad-311-364/
  30. https://www.academia.edu/3095058/The_vices_of_emperor_Constans_I_in_the_fourth_century_histories
  31. https://doaj.org/article/c358255164f6482981168c04563614f5
  32. https://www.tertullian.org/fathers/eutropius_breviarium_2_text.htm
  33. https://www.livius.org/articles/person/magnentius/
  34. https://roman-emperors.sites.luc.edu/magnent.htm
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