300 To 349
This Decade - Military Technology Roman fortress walls begin following the contours of the ground on which they are situated.
x - Diocletian issues the Edict of Prices introducing direct control of wages and prices.
x - Diocletian banned Christians from the Roman Army.
x - Violent persecution of Christians by Emperor Diocletian.
feb 23 - Emperor Diocletian orders general persecution of Christians.
feb 24 - 1st official Roman edict for persecution of Christians issued.
apr 23 - George, knight/saint/patron of England, beheaded.
oct 25 - Marcellinus, bishop of Rome, dies.0140440844
may 01 - Emperor Gaius Aurelius Valerius Diocletianus Jovius of Rome resigns.
oct 28 - Mark Aurelius Valerius Maxentius proclaimed emperor of Rome.
nov 30 - St Marcellus I begins his reign as Catholic Pope.
x - Christianity The beginning of Arianism.
feb 16 - Pamphilus van Caesarea, Palestinian scholar/martyr, beheaded.
oct 21 - St Eusebius ends his reign as Catholic Pope. re.List of Popes
apr 30 - Emperor Galerius legal recognizes Christians in the Roman Empire.
may 05 - Gaius VM Galerius, emperor of Rome, dies at about 50.
jul 02 - St Militiades begins his reign as Catholic Pope.
c - Emperor Constantine embraces Christianity.
jan 07 - Lucianus of Antioch, theologist/saint, dies.
sep 24 - Start of Imperial Indication.
oct 28 - Emperor Constantine the Great beats rival Maxentius to become absolute ruler of the Roman Empire.
x - Christianity Constantine makes Christianity legal.
jan 01 - Start of Roman (Pontifical) Indiction.
apr 30 - Gaius G V Maximus, Daia, Emperor of Rome, dies.
jan 31 - St Silvester I begins his reign as Catholic Pope. re.List of Popes
oct 08 - Battle at Cibalae: emperor Constantine beats emperor Licinius.
c - Rise of Gupta empire in Ganges Valley, India
may 18 - Alexander III the Great, king of Macedonia/conqueror, dies at 32.
jul 03 - Battle at Adrianopolis: Flavius Julius Crispus' beats emperor Licinius.
sep 18 - Chrysopolis emperor Constantine beats emperor Licinius.
may 20 - 1st Christian ecumenical council opens at Nicea, Asia Minor.
jun 19 - Roman Emperor Constatine I holds the First Christian Ecumenical Council at Nicea, from which we get the first Canons of the Church, to settle the dispute over Arianism the heresy of denying the deity of Christ and deal with other doctrinal issues. s.aug 25 325
aug 25 - The first Council of Nicaea ended. Formally opened in jun 19 325 by Constantine I, the council rejected Arianism and formulated the basis of today's Nicene Creed establishing the doctrine of the Holy Trinity..
x - Queen Helena, mother of Byzantine Emperor Constantine, visits Jerusalem and begins building major churches, including Holy Sepulchre.
may 11 - Constantinople becomes capital of Roman Empire.
x - The seat of the Roman Empire is moved to Consantinople.
nov 17 - Flavius Claudius Julianus, Julian the Apostate, emperor, is born.
sep 17 - Church of Heilig Grave initiated in Jerusalem.
oct 21 - Constantinople emperor Constantine the Great rules laws against Jews.
oct 07 - St Mark. Catholic Pope, dies. re.List of Popes
dec 25 - Earliest possible date that Christmas was celebrated on Dec 25th.
may 14 - Pachomius, Egyptian monastery founder/abbot (Coenobieten), dies.
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