References are numbered in [brackets], which are listed here. A number after the dot gives the page in the source.

Last updated: 2008 April 30.

303 February 23 Emperor Diocletian orders general persecution of Christians. [1] February 24 First official Roman edict for persecution of Christians issued. [1] April 23 George, knight of Cappadocië/saint/patron of England, beheaded. [1] 305 May 1 Emperor Gaius Aurelius Valerius Diocletianus Jovius of Rome resigns. [1] 306 November 30 Saint Marcellus I begins his reign as Catholic Pope. [1] 308 January 16 Saint Marcellus I dies, ending his reign as Catholic Pope. [1] 309 February 16 Pamphilus van Caesarea, Palestinian scholar/martyr, beheaded. [1] 310 April 18 Saint Eusebius begins his reign as Catholic Pope. [1] October 21 Saint Eusebius ends his reign as Catholic Pope. [1] 311 April 30 Emperor Galerius recognizes Christians legally in the Roman Empire. [1] May 5 Gaius VM Galerius, emperor of Rome, dies at about 50. [1] July 2 Saint Militiades begins his reign as Catholic Pope. [1] 312 January 7 Lucianus of Antioch, theologist/saint, dies. [1] 313 January 1 Start of Roman (Pontifical) Indiction. [1] April 30 Gaius G V Maximus [Daia], Emperor of Rome, dies. [1] 314 January 11 Saint Militiades ends his reign as Catholic Pope. [1] January 31 Saint Silvester I begins his reign as Catholic Pope. [1] 317 August 7 Birth of Constantius II, Roman emperor (337-61). [1] 323 May 18 Alexander III the Great, king of Macedonia/conqueror, dies at 32. [1] 325 May 20 First Christian ecumenical council opens at Nicæa, Asia Minor. [1] 329 January 1 Kontantinus (Konstantin's Son) becomes Caesar of the Western Roman Empire. His capital is Trier. [37] 335 December 31 Saint Silvester I ends his reign as Catholic Pope. [1] 336 January 18 Saint Mark begins his reign as Catholic Pope. [1] October 7 Saint Mark ends his reign as Catholic Pope. [1] 337 February 6 Saint Julius I begins his reign as Catholic Pope. [1] May 22 Constantine the Great, emperor of Rome (306-37)/anti semite, dies. [1] December 25 Earliest possible date that Christmas is celebrated on December 25th. [1] 347 May 14 Pachomius, Egyptian monastery founder/abbot (Coenobieten), dies. [1] 350 January 18 General Maxentius drives out Western Roman emperor Constans. [1] 352 April 12 Saint Julius I dies, ending his reign as Catholic Pope (337-352). [1] May 17 Liberius begins his reign as Catholic Pope replacing Julius I. [1] December 25 First definite date Christmas is celebrated on December 25th. [1] 354 November 13 Birth of Saint Augustine of Hippo Numidia, Algeria, convert/Christian philosopher. [1] 356 February 19 Emperor Constantius II shuts all heathen temples. [1] 357 April 28 Emperor Constantius II visits Rome. [1] 364 February 17 Flavius Jovianus, Christian emperor of Rome (363-64), dies at about 32. [1] 365 November 22 Felix II ends his reign as Catholic Pope. [1] 366 September 24 Liberius ends his reign as Catholic Pope. [1] October 1 Saint Damasus I begins his reign as Catholic Pope. [1] 374 February 16 Ninth recorded perihelion passage of Halley's Comet. [1] April 1 Halley's Comet approaches within 0.0884 astronomical units (AUs) of Earth. [1] 378 August 9 Battle of Adrianople, Visigoth Calvary defeats Roman Army. [1] 379 January 1 Basilius the Great of Caesarea, saint (Moralia), dies. [1] January 19 Theodosius installed as co-emperor of East Roman Empire. [1] 384 May 13 Servatius/Aravatius, bishop of Tongeren, dies at 65+. [1] December 11 Saint Damasus I ends his reign as Catholic Pope. [1] 385 February 11 Oldest Pope elected; Siricius - bishop of Tarragona. [1] 387 April 18 Bishop Ambrosius of Milan baptizes Augustinus. [1] 390 December 25 Roman emperor Theodosius admits debt on mass murder in Thessalonica. [1] 392 May 15 Valentinianus II, emperor of Rome (375-392), murdered at 21. [1] 395 January 17 Theodosius I the Great, Spanish emperor of Rome, dies at 49. [1] 397 April 4 Ambrosius, Governor of Liguria/bishop of Milan (374-97)/saint, dies. [1] 399 November 26 Saint Siricius ends his reign as Catholic Pope. [1] November 27 Saint Anastasius I begins his reign as Catholic Pope. [1] 401 April 10 Birth of Theodosius II the Younger, Eastern Roman emperor. [1] December 19 Anastasius I, Bishop of Rome (399-401), dies. [1] Saint Anastasius I ends his reign as Catholic Pope. [1] December 22 Saint Innocent I begins his reign as Catholic Pope. [1] 402 April 6 Battle at Pollentia; Roman army under Stilicho beats Visigoten. [1] 404 January 1 Last gladiator competition in Rome. [1] Telemachus, Roman monk, murdered. [1] 406 December 31 80,000 Vandels attack the Rhine at Mainz. [1] Godagisel, king of the Vandals, dies in battle. [1] 410 August 14 Alaric sacks Rome. [1] August 24 Rome overrun by Visigoths, symbolized fall of Western Roman Empire. [1] 412 February 8 Birth of Saint Proclus, patriarch of Constantinople. [1] 414 January 1 King Ataulf of Narbonne marries emperor Honorius' sister Galle Placidia. [1] 417 March 11 Zosimus becomes bishop of Rome. [1] March 12 Saint Innocent I dies, ending his reign as Catholic Pope. [1] March 18 Saint Zosimus begins his reign as Catholic Pope. [1] 418 March 10 Jews are excluded from public office in the Roman Empire. [1] December 26 Saint Zosimus ends his reign as Catholic Pope. [1] December 28 Saint Boniface I begins his reign as Catholic Pope. [1] 419 July 2 Birth of Valentinian III, Roman emperor (425-55). [1] 421 February 8 Flavius Constantine becomes emperor Constantine III of West Roman empire. [1] March 25 City of Venice is founded. [1] 422 September 4 Saint Boniface I ends his reign as Catholic Pope. [1] September 10 Saint Celestine I begins his reign as Catholic Pope. [1] 429 January 16 Honoratius of Arles, bishop/saint, dies. [1] 431 June 22 Council of Ephesus (third ecumenical council) opens. [1] 432 March 17 Saint Patrick, a bishop, is carried off to Ireland as a slave. [1] July 27 Saint Celestine I ends his reign as Catholic Pope. [1] July 31 Saint Sixtus III begins his reign as Catholic Pope. [1] 439 December 31 Melania the Younger, Roman monastery founder/saint, dies at about 56. [1] 440 August 19 Saint Sixtus III ends his reign as Catholic Pope. [1] 450 December 3 Petrus Chrysologus, first archbishop of Ravenna, dies. [1] 451 April 7 Attila's Hun's plunder Metz. [1] June 24 Tenth recorded perihelion passage of Halley's Comet. [1] October 8 Council of Chalcedon (fourth ecumenical council) opens. [1] 452 June 8 Italy invaded by Attila the Hun. [1] 455 March 17 Roman senator Petronius Maximus becomes Emperor. [1] May 31 Petronius Maximus, senator/Emperor of Rome, lynched. [1] June 2 Gaiseric and the Vandals sack Rome. [1] 461 March 17 Saint Patrick, patron Saint of Ireland, dies in Saul (according to legend). [1] November 10 Saint Leo I ends his reign as Catholic Pope. [1] November 19 Saint Hilary begins his reign as Catholic Pope. [1] 463 July 16 Start of Lunar Cycle of Hilarius. [1] 468 February 29 Saint Hilary [Pope Hilarius], Catholic Pope (461-468), dies. [1] March 3 Saint Simplicius elected to succeed Catholic Pope Hilarius. [1] December 18 Huna Mari bar Mar Zutra rabbi, executed in Pumpedita. [1] 472 August 18 Birth of Flavius Ricimer, general of the Western Roman Empire, kingmaker. [1] 474 February 3 Leo I, Byzantine Emperor (457-74), dies. [1] 476 September 4 Romulus Augustulus, last Roman emperor in west, is deposed. [1] 482 January 8 Severinus, German monastery founder/saint, dies. [1] 483 March 10 Simplicius, Italian Pope (468-83), dies. [1] March 13 Saint Felix III begins his reign as Catholic Pope. [1] 485 April 17 Proclus, Greek mathematician, dies in Athens. [1] 492 March 1 Saint Felix III ends his reign as Catholic Pope. [1] Saint Gelasius I begins his reign as Catholic Pope. [1] 493 March 15 Ostrogoten King Theodorik the Great defeats Odoaker of Italy. [1] Odoaker, German army leader/King of Italy (476-493), dies. [1] 496 November 21 Saint Gelasius I ends his reign as Catholic Pope. [1] November 24 Anastasius II begins his reign as Catholic Pope. [1] 498 November 19 Anastasius II ends his reign as Catholic Pope. [1] November 22 Saint Symmachus begins his reign as Catholic Pope. [1] December 25 French king Clovis baptises himself. [1] 502 March 29 Bourgundy King Gundobar delegates royal power. [1] 506 February 2 King Alarik II of Visigoten delegates Lex Romania Visigothorum out. [1] 512 June 29 A monastic chronicler in Ireland records a solar eclipse. [5] 514 July 19 Saint Symmachus ends his reign as Catholic Pope. [1] July 20 Saint Hormisdas begins his reign as Catholic Pope. [1] 523 May 6 Thrasamunde king of Vandalen. [1] August 6 Saint Hormisdas ends his reign as Catholic Pope. [1] August 13 Saint John I begins his reign as Catholic Pope. [1] 526 May 18 Saint John I dies, ending his reign as Catholic Pope. [1] May 20 Earthquake kills 250,000 in Antioch, Syria. [1] July 12 Saint Felix IV begins his reign as Catholic Pope. [1] 527 April 1 Justinianus becomes compassionate emperor of Byzantium. [1] 530 September 22 Saint Felix IV ends his reign as Catholic Pope. [1] Boniface II begins his reign as Catholic Pope. [1] 532 January 11 Nika-revolt against Justianus and Theodora in Hippodrome Constantinople. [1] January 18 Nika uprising at Constantinople fails, 30-40,000 die. [1] July 19 Start of Dionysian Pascal Cycle. [1] October 17 Boniface II ends his reign as Catholic Pope. [1] 533 January 2 John II begins his reign as Catholic Pope. [1] January 13 Remigius van Reims, first bishop of Reims (459-533)/saint, dies about 96. [1] 535 April 30 Amalaswintha, queen of Ostrogoten, murdered. [1] May 8 John II ends his reign as Catholic Pope. [1] May 13 Saint Agapitus I begins his reign as Catholic Pope. [1] 536 April 22 Saint Agapitus I ends his reign as Catholic Pope. [1] June 8 Saint Silverius begins his reign as Catholic Pope. [1] December 9 Byzantines Libya occupies Rome on Ostrogoten. [1] 537 March 11 Goths lay siege to Rome. [1] November 11 Saint Silverius ends his reign as Catholic Pope. [1] December 27 Saint Sofia, church in Constantinople, initiated. [1] 538 November 30 Birth of Saint Gregory of Tours, chronicler/bishop. [1] 552 July 10 Origin of Armenian calendar. [1] 553 May 5 Second Council of Constantinople (fifth ecumenical council) opens. [1] 555 June 7 Vigilius ends his reign as Catholic Pope. [1] 556 February 21 Maximianus van Ravenna, bishop (Basilica S Stefano), dies. [1] April 16 Pelagius I begins his reign as Catholic Pope. [1] 558 December 23 Childebert, king of France (511-58), dies at about 62. [1] 561 March 3 Pelagius I ends his reign as Catholic Pope. [1] July 17 John III begins his reign as Catholic Pope. [1] 565 August 22 Saint Columba reported seeing monster in Loch Ness. [1] November 14 Justinian, Roman emperor, dies at 82. [1] 570 January 19 Birth of Mohammed, Islamic prophet (Koran). [1] June 8 Relgion of Islam (submission) founded in Mecca. [1] 574 July 13 John III ends his reign as Catholic Pope. [1] 575 June 2 Benedict I begins his reign as Catholic Pope. [1] 579 July 30 Benedict I ends his reign as Catholic Pope. [1] November 26 Pelagius II begins his reign as Catholic Pope. [1] 585 April 28 War between Lydia and Media ended by solar eclipse. [1] 590 February 7 Pelagius II Gothic Pope (579-90), dies from plague. [1] September 3 Saint Gregory I begins his reign as Catholic Pope. [1] 593 March 28 Guntram, French king in Burgundy, dies at about 67. [1] 597 December 25 England adopts Julian calendar. [1]