Siliqua Currency Reform
Under Constantine's monetary system, new silver denominations including the siliqua enter circulation after he becomes sole emperor.
Role range: 0306-0337
Historical biography archive · Updated 2026-11-03
Constantine I the Great Biography and Timeline — Page 2
Follow Constantine I the Great through 64 dated historical records for Roman Empire.
Constantine I the Great, historical timeline
A chronological timeline drawn from matching World History Database records.
64Distinct records
2 of 2Page
324–337Years on this page
324
Sole Emperor
After Licinius surrenders, Constantine becomes sole ruler of the Roman Empire.
Role range: 0306-0337
Hellespont Naval Victory
Constantine's son Crispus defeats Licinius's fleet in the Hellespont, helping Constantine secure the final victory in the civil war.
Role range: 0306-0337
325
Council of Nicea
The First Council of Nicaea formally opens at Nicaea under imperial sponsorship to address the Arian controversy and other church disputes.
Role range: 0306-0337
Execution of Licinius
Constantine orders the execution of the former emperor Licinius after initially permitting him to live in retirement.
Role range: 0306-0337
Arius Condemned at Nicaea
The bishops assembled at Nicaea condemn Arius and his principal theological claims after extended debate.
Role range: 0306-0337
Council of Nicea
The Council of Nicaea adopts a creed affirming the Son as of the same substance with the Father and condemns Arius's teaching.
Role range: 0306-0337
Nicaea Easter Agreement
The Council of Nicaea also seeks a common method for determining the date of Easter across Christian communities.
Role range: 0306-0337
326
Vicennalia
Constantine celebrates the twentieth anniversary of his accession with ceremonies in Rome.
Role range: 0306-0337
Dedication of Old Saint Peter's
The Constantinian basilica over the traditional site of Saint Peter's tomb is dedicated in Rome.
Role range: 0306-0337
Death of Fausta
Constantine's wife Fausta dies soon after Crispus; surviving sources disagree about the circumstances and Constantine's responsibility.
Role range: 0306-0337
Execution of Crispus
Constantine orders the execution of his eldest son Crispus at Pola under circumstances that remain uncertain.
Role range: 0306-0337
329
Death of Helena
Constantine's mother Helena dies after becoming an influential patron of Christian foundations and pilgrimage traditions.
Role range: 0306-0337
330
Dedication of Constantinople
Constantine formally dedicates Constantinople on the site of Byzantium as a major imperial residence and administrative center.
Role range: 0306-0337
334
Sarmatian Resettlement
Constantine resettles large numbers of displaced Sarmatians within Roman territory after upheaval beyond the Danube.
Role range: 0306-0337
335
Consecration
The Church of the Holy Sepulchre in Jerusalem is dedicated during celebrations connected with Constantine's thirtieth regnal year.
Role range: 0306-0337
Dalmatius Made Caesar
Constantine elevates his nephew Dalmatius to the rank of Caesar and assigns him territories in the Balkans.
Role range: 0306-0337
Hannibalianus Made King
Constantine grants his nephew Hannibalianus the title King of Kings of the Pontic peoples within his dynastic settlement.
Role range: 0306-0337
Synod of Tyre
Constantine summons bishops to Tyre to examine charges against Athanasius before the Jerusalem dedication ceremonies.
Role range: 0306-0337
337
Death of Constantine I the Great
Constantine I dies near Nicomedia on May 22, 337, after falling ill while preparing for a Persian campaign.
Role range: 0306-0337
Succession
After Constantine's death, his surviving sons Constantine II, Constantius II, and Constans eventually rule separate portions of the empire.
Role range: 0306-0337
Baptism
Shortly before his death, Constantine receives Christian baptism from Eusebius, bishop of Nicomedia.
Role range: 0306-0337
Tomb Preparations
Constantine prepares an imperial burial place for himself in the Church of the Holy Apostles at Constantinople.
Role range: 0306-0337
Mobilization
Constantine mobilizes forces for a planned campaign against Shapur II's Sasanian Empire but dies before the expedition begins.
Role range: 0306-0337
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.