Great Persecution to Constantinian Settlement

Diocletian was established as Roman emperor in AD 284 and remained a principal ruler until his abdication in AD 305.

Source loci: Fasti/titulature — Diocletian | CIL/ILS tetrarchic imperial dedications

Tetrarchic inscriptions, titulature and administrative evidence attest substantial imperial restructuring during Diocletian’s reign.

Source loci: Fasti/titulature — Diocletian | CIL/ILS tetrarchic imperial dedications | Edictum Diocletiani de pretiis — inscriptional witnesses

The exact chronology and jurisdictional reach of individual Diocletianic reforms remain source-specific rather than recoverable as one uniform sequence.

Source loci: CIL/ILS tetrarchic imperial dedications | Edictum Diocletiani de pretiis — inscriptional witnesses | DMP 7

By the AD 293 reorganization, imperial government operated through a collegiate tetrarchic structure of senior and junior emperors attested by titulature, inscriptions and later chronological controls.

Source loci: Fasti/titulature — Diocletian | Fasti/titulature — Maximian | Fasti/titulature — Constantius I

Contemporary inscriptions, milestones, panegyrics and coinage publicly represented the tetrarchic rulers through coordinated titulature and imperial ideology.

Source loci: CIL/ILS tetrarchic imperial dedications | CIL/AE tetrarchic administrative inscriptions | Pan. Lat. 10(2)

The abdication of Diocletian and Maximian on 1 May AD 305 is a secure political transition within the tetrarchic sequence.

Source loci: DMP 19 | HE 8.13 | Fasti/titulature — Diocletian | Fasti/titulature — Maximian

Eusebius describes substantial Christian growth and enlarged places of assembly before the outbreak of the AD 303 persecution.

Source loci: HE 8.1

Inscriptional and material evidence independently attests local Christian presence and institutional visibility in parts of the empire before AD 303.

Source loci: CIL/ICUR/SEG Christian inscription candidates

The evidence supports regional variation in Christian institutions, property and worship rather than one empire-wide pre-persecution condition.

Source loci: HE 8.1 | CIL/ICUR/SEG Christian inscription candidates

Eusebius’s notice associates Armenians with Christianity during Maximin Daia’s eastern conflicts, providing an early-fourth-century witness to an Armenian Christian context.

Source loci: HE 9.8.2

Later Armenian and Syriac conversion/martyr traditions preserve important eastern Christian memory but do not securely fix a single conversion chronology for Armenia or Mesopotamia within AD 284–324.

Source loci: Agathangelos — conversion tradition | Armenian conversion chronology — later carriers | Syriac Acts of Shmona and Gurya

Lactantius places the destruction of the principal church at Nicomedia on 23 February AD 303 and the posting of the first persecution edict there on the following day, 24 February AD 303.

Source loci: DMP 12–13 | HE 8.2.4–5

Lactantius and Eusebius independently preserve a core picture of the first persecution measure attacking Christian assemblies, buildings/scriptures and legal standing.

Source loci: DMP 12–13 | HE 8.2.4–5

The Nicomedia promulgation and surviving summaries do not by themselves prove simultaneous or procedurally identical enforcement in every province.

Source loci: DMP 12–13 | HE 8.2.4–5 | HE 8.2

Eusebius attests successive intensification after the first edict, including measures directed at clergy and sacrifice compliance.

Source loci: HE 8.6 | HE 8.6

The conventional multi-edict reconstruction for AD 303–304 cannot be treated as four fully preserved original texts with certain wording, dates and empire-wide application.

Source loci: HE 8.6 | HE 8.6 | HE 8.2.4–5

North-African martyr and traditio dossiers show that scripture surrender, arrest, worship and sacrifice enforcement were implemented through local administrative settings.

Source loci: Acta Saturnini, Dativi et al. / Abitina | Acta Felicis episcopi Thibiucensis

Lactantius places destructive fires and intensified court repression at Nicomedia within the opening months of the AD 303 persecution crisis.

Source loci: DMP 14

Responsibility for the Nicomedia fires and the precise causal relation between the fires, court accusations and subsequent executions remain contested.

Source loci: DMP 14 | DMP 15

Eusebius’s Martyrs of Palestine preserves a comparatively detailed local sequence of Palestinian arrests, trials, punishments and martyrdoms during AD 303–310/311.

Source loci: MP short 1 | MP short 2 | MP short 3

The short and long recensions of Martyrs of Palestine are related textual forms of an Eusebian dossier and must not be counted as independent event-era votes merely because both survive.

Source loci: MP short 1 | MP short 2

Palestinian year/month notices can anchor local events but cannot be projected automatically onto Egypt, Africa, Italy or other provinces.

Source loci: MP short 1 | MP short 3

Egyptian episcopal, documentary and martyr evidence attests severe persecution and Christian suffering in Egypt and the Thebaid during the AD 303–311 period.

Source loci: HE 8.10.1–10 | P. Bodmer XX | P. Chester Beatty XV

Egyptian papyrological and documentary witnesses, where dated and provenanced, provide direct local evidence that must be kept distinct from later literary martyr traditions.

Source loci: Peter Alex. Canon 1 | Peter Alex. Canon 2

The chronology of individual Egyptian/Thebaid martyr and episcopal episodes remains source-specific even though the broader persecution horizon is secure.

Source loci: HE 8.10.1–10 | P. Bodmer XX

North-African sources attest disputes over surrender of scriptures or ecclesiastical property, imprisonment and confessor/bishop conduct during and after the persecution.

Source loci: Acta apud Cirtam / Cirta traditor dossier | Acta Saturnini, Dativi et al. / Abitina | Acta Felicis episcopi Thibiucensis

The Abitinian martyr dossier preserves evidence of Christian assembly and prosecution in North Africa under persecution.

Source loci: Optatus 1.12

Roman episcopal succession and persecution-era community history in AD 303–306 are recoverable only through source-controlled literary, inscriptional and cemetery evidence.

Source loci: HE 7–10 Roman succession references | Liberian Catalogue — Roman episcopal chronology | Chronography of 354 — martyr/succession entries

Later Roman martyr and cemetery traditions can preserve local memory but must be separated from near-contemporary evidence when reconstructing persecution events.

Source loci: Chronography of 354 — martyr/succession entries | Roman martyr-cemetery dossier

Great-Persecution martyr acts form a heterogeneous corpus whose surviving textual forms range from relatively early dossiers to substantially later hagiographic elaboration.

Source loci: Acta Saturnini, Dativi et al. / Abitina | Acta Felicis episcopi Thibiucensis | Passio/Acta Agnetis — later tradition

Named martyr traditions may preserve historical cores, but later narrative detail, speeches, miracles and exact dates require independent control before use as event-era fact.

Source loci: Acta Saturnini, Dativi et al. / Abitina | Acta Felicis episcopi Thibiucensis

De mortibus persecutorum is a near-contemporary witness for major persecution and imperial-political sequences and preserves important Latin legal material.

Source loci: DMP 7 | DMP 12 | DMP 19

The exact composition date, authorial setting and relationship of Lactantius to every narrated event remain open within an early-fourth-century horizon.

Source loci: DMP 7 | DMP 12

Eusebius’s Ecclesiastical History books 8–10 provide near-contemporary testimony, eyewitness claims and documentary excerpts for persecution, toleration and Constantinian settlement.

Source loci: HE 8.1 | HE 8.2 | HE 8.17

The short and long Martyrs of Palestine recensions witness textual revision/transmission within one Eusebian source stream rather than two independent persecution witnesses.

Source loci: HE 9.1 | HE 9.9

The exact revision chronology of HE 8–10 and Martyrs of Palestine remains open beyond bounded early-fourth-century composition/revision horizons.

Source loci: HE 8.1 | HE 8.2

Lactantius dates the promulgation of Galerius’s toleration measure at Nicomedia to 30 April AD 311, and Eusebius transmits a corresponding Greek text.

Source loci: DMP 34 | HE 8.17.3–10

The Galerian measure ended the previous legal posture of persecution and allowed Christians to exist and assemble subject to public-order conditions while requesting their prayers for the emperors and state.

Source loci: DMP 34 | HE 8.17.3–10

The Lactantian Latin and Eusebian Greek carriers of the Galerian text are parallel transmission witnesses and must be compared without assuming verbatim identity or complete independence.

Source loci: DMP 34 | HE 8.17.3–10

Eusebian documentary material and narrative evidence indicate that Maximin Daia’s eastern policy after AD 311 involved changing measures, local petitions and renewed pressure rather than a single unchanging legal posture.

Source loci: HE 9.1 | HE 9.7 | HE 9.9.13–25

Lactantius provides 30 April AD 313 as the battle date for Licinius’s defeat of Maximin Daia at Campus Ergenus/Serenus.

Source loci: DMP 46 | Fasti/titulature — Maximin Daia | Fasti/titulature — Constantine/Licinius

Maximin’s final concessions and the end of his rule belong to the AD 313 transition, but their exact legal sequence and reception remain source-controlled.

Source loci: HE 9.1 | HE 9.7

Constantius I died at York on 25 July AD 306, after which Constantine was acclaimed by the army.

Source loci: DMP 24 | HE 8.13 | Fasti/titulature — Constantius I | Fasti/titulature — Constantine/Licinius

Constantine’s status after the York acclamation was negotiated within the existing imperial college rather than instantly constituting uncontested sole legitimacy.

Source loci: DMP 24 | DMP 25 | Pan. Lat. 7(6)

Later biographical presentations of Constantine’s accession must be distinguished from near-contemporary chronology and titulature evidence.

Source loci: DMP 24 | DMP 25

Maxentius ruled at Rome from AD 306 to 312 within a Christian community context that included episcopal succession conflicts and changing relations with imperial authority.

Source loci: DMP 29 | DMP 30 | HE 8.14

Source-specific evidence for Maxentius and Roman Christians must be separated from later Constantinian polemic and victory narratives.

Source loci: DMP 29 | DMP 30

Constantine defeated Maxentius at the Milvian Bridge on 28 October AD 312.

Source loci: DMP 44 | HE 9.9 | Fasti/titulature — Maxentius | Fasti/titulature — Constantine/Licinius

Lactantius and Eusebius preserve distinct traditions concerning Constantine’s pre-battle religious experience and sign use.

Source loci: DMP 44 | HE 9.9

The fuller vision narrative in Vita Constantini is a later Constantinian biographical account and must be distinguished from earlier witnesses.

Source loci: VC 1.27 | VC 1.28

Constantine and Licinius met at Milan in early AD 313, while the surviving religious-liberty/property-restoration text is securely anchored by Lactantius to promulgation at Nicomedia on 13 June AD 313.

Source loci: DMP 48 | DMP 48

The preserved AD 313 legal text grants broad freedom of religious observance and orders restoration of Christian corporate property without purchase price.

Source loci: DMP 48 | DMP 48

The surviving evidence does not require treating “Edict of Milan” as the title of one extant formal edict issued at Milan in the exact form preserved by later carriers.

Source loci: DMP 48 | DMP 48

After AD 313 Constantine and Licinius remained imperial colleagues and later rivals until Constantine’s victory over Licinius in AD 324.

Source loci: VC 1.49 | VC 1.50 | VC 2.1

Christian literary accounts of Licinius’s later policy are shaped by the subsequent Constantine–Licinius conflict and require hostile-source control.

Source loci: VC 1.49 | VC 1.50

The North-African dispute associated with Caecilian, Majorinus and Donatus emerged from post-persecution conflicts involving ordination legitimacy, traditor accusations and competing ecclesial constituencies.

Source loci: Acta apud Cirtam / Cirta traditor dossier | Optatus 1.12 | Optatus 1.13

Much of the surviving dossier is transmitted through later controversy, requiring separation of earlier documentary kernels from later party framing.

Source loci: Acta apud Cirtam / Cirta traditor dossier | Optatus 1.12

The exact order and dates of Caecilian’s ordination, Majorinus’s rival ordination, Donatus’s emergence and associated synodal actions remain partly disputed.

Source loci: Acta apud Cirtam / Cirta traditor dossier | Optatus 1.12 | Optatus 1.13

Constantine referred the North-African dispute to a Roman ecclesiastical hearing in AD 313, demonstrating early imperial involvement in adjudication of the controversy.

Source loci: HE 10.5.18–20 | HE 10.5.21–24 | HE 10.5.18–20

The Council of Arles was summoned to open on 1 August AD 314.

Source loci: HE 10.5.21–24 | Arles 314 canons | Constantinian Arles summons dossier | HE 10.5.21–24

The African dispute continued through appeals and imperial correspondence after Arles, showing a developing rather than instantaneous church-state adjudicative relationship.

Source loci: HE 10.5.18–20 | HE 10.5.21–24 | HE 10.5.18–20

Constantinian letters and legal measures after AD 312/313 provide for restoration of Christian property and privileges or exemptions for clergy in specified contexts.

Source loci: HE 10.5.15–17 | HE 10.7.1–2 | HE 10.6

Inscriptions and archaeological phases attest substantial Constantinian patronage and basilical building activity in selected cities during AD 312/313–324.

Source loci: CIL VI 1139 / Arch of Constantine attic inscription | CIL/ICUR building/donation dossiers | Rome Constantinian basilicas — archaeological phases | Lateran complex — early Constantinian phases

Constantinian patronage developed through multiple grants, restorations, exemptions and building projects rather than one single legal act creating a mature church-state system.

Source loci: HE 10.5.15–17 | HE 10.7.1–2 | Rome Constantinian basilicas — archaeological phases

Later legal codes preserve Constantinian constitutions affecting clergy, church property, public obligations and other religiously relevant matters during AD 313–324.

Source loci: CTh 16 — Constantinian constitutions | CTh 16.2 — Constantinian strata | CTh 9 — Constantinian strata

The Codex Theodosianus is a later carrier of Constantinian legislation and cannot be treated as an unchanged contemporary code of the AD 310s–320s.

Source loci: CTh 16 — Constantinian constitutions | CTh 16.2 — Constantinian strata | CTh Constantinian constitution metadata

Constantinian measures do not by themselves establish the mature Theodosian legal-religious order of the later fourth century.

Source loci: CTh 16 — Constantinian constitutions | CTh 16.2 — Constantinian strata

Letters of Alexander and Arius establish that the Alexander–Arius controversy was active before the Council of Nicaea and involved competing doctrinal claims and episcopal networks.

Source loci: Alexander, Epistle on Arianism 1 | Alexander, Epistle Catholic | Arius, Letter to Eusebius of Nicomedia | Arius, Letter to Alexander / Athanasius De Synodis 16

The exact beginning of the controversy and the order of all letters, depositions and local synods remain disputed within the late-AD-310s/early-320s horizon.

Source loci: Alexander, Epistle on Arianism 1 | Alexander, Epistle Catholic | Alexander, Deposition of Arius | Arius, Letter to Eusebius of Nicomedia

Pre-Nicene evidence may establish issues and networks that precede AD 325 but may not be read as though later Nicene formulations had already been formally adopted.

Source loci: Alexander, Epistle on Arianism 1 | Pre-Nicaea controversy — pre-AD 325 evidence only

Eusebius preserves early-fourth-century classifications of recognized, disputed and rejected writings, providing evidence for reception history in his own period.

Source loci: HE 3.25 | HE 6.25

P45, P46, P47, P66, P75, P72 and the major fourth-century codices are direct witnesses to copied biblical texts, but their copy dates do not constitute composition dates.

Source loci: P45_CHESTER_BEATTY_I | P46_CHESTER_BEATTY_II | P47_CHESTER_BEATTY_III | P66_BODMER_II | P75_BODMER_XIV_XV | P72_BODMER_MISCELLANEOUS

Early versional evidence must keep translation horizon, surviving-copy date and later textual transmission as distinct chronological questions.

Source loci: HE 3.25 | P45_CHESTER_BEATTY_I

Coins, inscriptions, papyri and archaeological phases can directly anchor object-level titulature, minting, dedication, burial, building or administrative contexts within AD 284–324.

Source loci: OCRE ric.5.dio.301 | OCRE ric.5.dio.322 | OCRE ric.5.dio.655 | CIL/ILS tetrarchic imperial dedications

Tetrarchic, Maxentian, Constantinian and Licinian coinages document public titulature, mint chronology and regime iconography.

Source loci: RIC VI — GENIO POPVLI ROMANI types | RIC VI — Constantine AD 306–312 types | RIC VI — Maxentius Rome types | RIC VII — western mints early issues | RIC VI/VII — Licinius types | OCRE ric.7.anch.45A

Material evidence must not be generalized from one site or object corpus into empire-wide institutional, theological or chronological conclusions without independent support.

Source loci: OCRE ric.5.dio.301 | CIL/ILS tetrarchic imperial dedications