__NOTOC__ Year 313 ( CCCXIII) was a

common year starting on Thursday A common year starting on Thursday is any non-leap year (i.e. a year with 365 days) that begins on Thursday, 1 January, and ends on Thursday, 31 December. Its dominical letter hence is D. The most recent year of such kind was 2015 and the next one ...

(link will display the full calendar) of the

Julian calendar The Julian calendar, proposed by Roman consul Julius Caesar in 46 BC, was a reform of the Roman calendar. It took effect on , by edict. It was designed with the aid of Greek mathematicians and astronomers such as Sosigenes of Alexandr ...

. At the time, it was known as the Year of the Consulship of Constantinus and Licinianus (or, less frequently, year 1066 ''

Ab urbe condita ''Ab urbe condita'' ( 'from the founding of the City'), or ''anno urbis conditae'' (; 'in the year since the city's founding'), abbreviated as AUC or AVC, expresses a date in years since 753 BC, the traditional founding of Rome. It is an exp ...

''). The denomination 313 for this year has been used since the early medieval period, when the

Anno Domini The terms (AD) and before Christ (BC) are used to label or number years in the Julian and Gregorian calendars. The term is Medieval Latin and means 'in the year of the Lord', but is often presented using "our Lord" instead of "the Lord", ...

calendar era A calendar era is the period of time elapsed since one ''epoch'' of a calendar and, if it exists, before the next one. For example, it is the year as per the Gregorian calendar, which numbers its years in the Western Christian era (the Coptic ...

became the prevalent method in Europe for naming years. This year is notable for ending of the persecution of

Christians Christians () are people who follow or adhere to Christianity, a monotheistic Abrahamic religion based on the life and teachings of Jesus Christ. The words ''Christ'' and ''Christian'' derive from the Koine Greek title ''Christós'' (Χρι ...

in the

Roman Empire The Roman Empire ( la, Imperium Romanum ; grc-gre, Βασιλεία τῶν Ῥωμαίων, Basileía tôn Rhōmaíōn) was the post-Republican period of ancient Rome. As a polity, it included large territorial holdings around the Mediterr ...

Events

By place

Roman Empire

* At the end of 312 or in early 313, the retired Emperor

Diocletian Diocletian (; la, Gaius Aurelius Valerius Diocletianus, grc, Διοκλητιανός, Diokletianós; c. 242/245 – 311/312), nicknamed ''Iovius'', was Roman emperor from 284 until his abdication in 305. He was born Gaius Valerius Diocles ...

dies in his palace in Split, most likely from natural causes. *

February February is the second month of the year in the Julian and Gregorian calendars. The month has 28 days in common years or 29 in leap years, with the 29th day being called the ''leap day''. It is the first of five months not to have 31 days (th ...

: Emperors

Constantine I Constantine I ( , ; la, Flavius Valerius Constantinus, ; ; 27 February 22 May 337), also known as Constantine the Great, was Roman emperor from AD 306 to 337, the first one to Constantine the Great and Christianity, convert to Christiani ...

and

Licinius Valerius Licinianus Licinius (c. 265 – 325) was Roman emperor from 308 to 324. For most of his reign he was the colleague and rival of Constantine I, with whom he co-authored the Edict of Milan, AD 313, that granted official toleration to C ...

convene in Mediolanum (modern

Milan Milan ( , , Lombard: ; it, Milano ) is a city in northern Italy, capital of Lombardy, and the second-most populous city proper in Italy after Rome. The city proper has a population of about 1.4 million, while its metropolitan city h ...

). Licinius marries Constantine's half-sister Constantia, and they issue the

Edict of Milan The Edict of Milan ( la, Edictum Mediolanense; el, Διάταγμα τῶν Μεδιολάνων, ''Diatagma tōn Mediolanōn'') was the February 313 AD agreement to treat Christians benevolently within the Roman Empire. Frend, W. H. C. ( ...

. This edict ends the Great Persecution against the

and is the first piece of legislation in western history to decree

freedom of religion Freedom of religion or religious liberty is a principle that supports the freedom of an individual or community, in public or private, to manifest religion or belief in teaching, practice, worship, and observance. It also includes the freedom ...

. It also returns property confiscated from Christians. The edict is posted in

Nicomedia Nicomedia (; el, Νικομήδεια, ''Nikomedeia''; modern İzmit) was an ancient Greek city located in what is now Turkey. In 286, Nicomedia became the eastern and most senior capital city of the Roman Empire (chosen by the emperor Diocletia ...

on June 13. * Emperor Maximinus Daza crosses the

Bosphorus The Bosporus Strait (; grc, Βόσπορος ; tr, İstanbul Boğazı 'Istanbul strait', colloquially ''Boğaz'') or Bosphorus Strait is a natural strait and an internationally significant waterway located in Istanbul in northwestern Tu ...

with an army of 70,000 men and lays siege to Heraclea in

Thrace Thrace (; el, Θράκη, Thráki; bg, Тракия, Trakiya; tr, Trakya) or Thrake is a geographical and historical region in Southeast Europe, now split among Bulgaria, Greece, and Turkey, which is bounded by the Balkan Mountains to t ...

. He captures the city after eight days. * Battle of Tzirallum: Licinius defeats his rival Maximinus in Thrace, who then flees to

Cilicia Cilicia (); el, Κιλικία, ''Kilikía''; Middle Persian: ''klkyʾy'' (''Klikiyā''); Parthian: ''kylkyʾ'' (''Kilikiyā''); tr, Kilikya). is a geographical region in southern Anatolia in Turkey, extending inland from the northeastern coa ...

. After losing the Cilician Gates to Licinius' forces, Maximinus commits suicide. * Licinius conducts a purge of the wider Tetrarchic dynasty. He executes

Galerius Gaius Galerius Valerius Maximianus (; 258 – May 311) was Roman emperor from 305 to 311. During his reign he campaigned, aided by Diocletian, against the Sasanian Empire, sacking their capital Ctesiphon in 299. He also campaigned across the D ...

' son Candidianus,

Valerius Severus Flavius Valerius Severus (died September 307), also called Severus II, was a Roman emperor from 306 to 307. After failing to besiege Rome, he fled to Ravenna. It is thought that he was killed there or executed near Rome. Background and early ...

' son Severianus (whom he accuses of conspiracy), and Maximinus' wife, son and daughter. Diocletian's wife

Prisca Priscilla is an English female given name adopted from Latin '' Prisca'', derived from ''priscus''. One suggestion is that it is intended to bestow long life on the bearer. The name first appears in the New Testament of Christianity variously a ...

and daughter Galeria Valeria go into hiding.

Asia

March 14 Events Pre-1600 * 1074 – Battle of Mogyoród: Dukes Géza and Ladislaus defeat their cousin Solomon, King of Hungary, forcing him to flee to Hungary's western borderland. * 1590 – Battle of Ivry: Henry of Navarre and the Huguen ...

–

Emperor Huai of Jin Emperor Huai of Jin (; 284 – March 14, 313), personal name Sima Chi (司馬熾), courtesy name Fengdu (豐度), was an emperor of the Jin Dynasty (266–420). Emperor Huai was captured in 311 and later executed in 313 under the order of Liu ...

is executed by Liu Cong, ruler of the

Xiongnu The Xiongnu (, ) were a tribal confederation of nomadic peoples who, according to ancient Chinese sources, inhabited the eastern Eurasian Steppe from the 3rd century BC to the late 1st century AD. Modu Chanyu, the supreme leader after 20 ...

state ( Han Zhao). At the imperial

new year New Year is the time or day currently at which a new calendar year begins and the calendar's year count increments by one. Many cultures celebrate the event in some manner. In the Gregorian calendar, the most widely used calendar system to ...

he and a number of former Jin officials are poisoned. Crown prince Min of Jin, age 13, succeeds, in

Chang'an Chang'an (; ) is the traditional name of Xi'an. The site had been settled since Neolithic times, during which the Yangshao culture was established in Banpo, in the city's suburbs. Furthermore, in the northern vicinity of modern Xi'an, Qin Shi ...

, his uncle Huai of Jin and becomes the new emperor of the Jin Dynasty. *

Nintoku , also known as was the 16th Emperor of Japan, according to the traditional List of Emperors of Japan, order of succession. Due to his reputation for goodness derived from depictions in the Kojiki and Nihon Shoki, he is sometimes referred to as ...

, the fourth son of Ōjin, becomes the 16th emperor of

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

By topic

Art and Science

Basilica of Maxentius and Constantine The Basilica of Maxentius and Constantine ( it, Basilica di Massenzio), sometimes known as the Basilica Nova—meaning "new basilica"—or Basilica of Maxentius, is an ancient building in the Roman Forum, Rome, Italy. It was the largest building ...

(or Basilica Nova), in

Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...

, is finished.

Religion

February 3 Events Pre-1600 * 1112 – Ramon Berenguer III, Count of Barcelona, and Douce I, Countess of Provence, marry, uniting the fortunes of those two states. *1451 – Sultan Mehmed II inherits the throne of the Ottoman Empire. *1488 – ...

–

Constantine the Great Constantine I ( , ; la, Flavius Valerius Constantinus, ; ; 27 February 22 May 337), also known as Constantine the Great, was Roman emperor from AD 306 to 337, the first one to Constantine the Great and Christianity, convert to Christiani ...

and co-emperor

meet at a conference in Mediolanum (modern

). They proclaim a policy of religious freedom for all, ending the persecution of Christians in the

and returning property confiscated from Christians. The edict is posted in

on June 13. *

October 2 Events Pre-1600 * 829 – Theophilos succeeds his father Michael II as Byzantine Emperor. * 939 – Battle of Andernach: Otto I, Holy Roman Emperor, crushes a rebellion against his rule, by a coalition of Eberhard of Franconia and ot ...

– Lateran Synod:

Donatism Donatism was a Christian sect leading to a schism in the Church, in the region of the Church of Carthage, from the fourth to the sixth centuries. Donatists argued that Christian clergy must be faultless for their ministry to be effective and t ...

is declared a

heresy Heresy is any belief or theory that is strongly at variance with established beliefs or customs, in particular the accepted beliefs of a church or religious organization. The term is usually used in reference to violations of important religi ...

. *

Arius Arius (; grc-koi, Ἄρειος, ; 250 or 256 – 336) was a Cyrenaic presbyter, ascetic, and priest best known for the doctrine of Arianism. His teachings about the nature of the Godhead in Christianity, which emphasized God the Father's un ...

preaches of the human nature of

Jesus Jesus, likely from he, יֵשׁוּעַ, translit=Yēšūaʿ, label=Hebrew/Aramaic ( AD 30 or 33), also referred to as Jesus Christ or Jesus of Nazareth (among other names and titles), was a first-century Jewish preacher and religious ...

Births

Cyril of Jerusalem Cyril of Jerusalem ( el, Κύριλλος Α΄ Ἱεροσολύμων, ''Kýrillos A Ierosolýmon''; la, Cyrillus Hierosolymitanus; 313 386 AD) was a theologian of the early Church. About the end of 350 AD he succeeded Maximus as Bishop of ...

, Christian bishop and theologian (d.

386 __NOTOC__ Year 386 ( CCCLXXXVI) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Honorius and Euodius (or, less frequently, year 113 ...

) *

Didymus the Blind Didymus the Blind (alternatively spelled Dedimus or Didymous) (c. 313398) was a Christian theologian in the Church of Alexandria, where he taught for about half a century. He was a student of Origen, and, after the Second Council of Constantinopl ...

, Alexandrian theologian (d.

398 __NOTOC__ Year 398 ( CCCXCVIII) was a common year starting on Friday (link will display the full calendar) of the Julian calendar, the 395th Year of the Common Era ( CE) and Anno Domini ( AD) designations, the 398th year of the 1st millennium, ...

) * Shi Hong, Chinese emperor of the Jie state (d.

334 __NOTOC__ Year 334 ( CCCXXXIV) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Optatus and Caesonius (or, less frequently, year 1087 ...

)

Deaths

– Huai of Jin, Chinese emperor (b.

284 __NOTOC__ Year 284 ( CCLXXXIV) was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Carinus and Numerianus (or, less frequently, year 1037 ...

) * Achillas (the Great), pope and patriarch of

Alexandria Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandria ...

* Galerius Valerius Maximinus, Roman emperor (b.

270 __NOTOC__ Year 270 ( CCLXX) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Antiochianus and Orfitus (or, less frequently, year 102 ...

) * Candidianus (son of Galerius) * Severianus, son of

* Guangxian, Chinese empress of the

state * Zhang Huiguang (or Wuxiao), Chinese empress

References

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