__NOTOC__ Year 313 ( CCCXIII) was a common year starting on Thursday (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''). 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 Copti ...

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'' (Χρ ...

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 Mediter ...

Events

By place

Roman Empire

* At the end of 312 or in early 313, the retired Emperor Diocletian dies in his palace in

Split Split(s) or The Split may refer to: Places * Split, Croatia, the largest coastal city in Croatia * Split Island, Canada, an island in the Hudson Bay * Split Island, Falkland Islands * Split Island, Fiji, better known as Hạfliua Arts, entertai ...

, most likely from natural causes. * February: 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 Mediolanum, the ancient city where Milan now stands, was originally an Insubrian city, but afterwards became an important Roman city in northern Italy. The city was settled by the Insubres around 600 BC, conquered by the Romans in 222 BC, and ...

(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 The Diocletianic or Great Persecution was the last and most severe persecution of Christians in the Roman Empire. In 303, the emperors Diocletian, Maximian, Galerius, and Constantius issued a series of edicts rescinding Christians' legal rights ...

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 freed ...

. 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 Diocleti ...

on June 13. * Emperor

Maximinus Daza Galerius Valerius Maximinus, born as Daza (20 November 270 – July 313), was Roman emperor from 310 to 313 CE. He became embroiled in the Civil wars of the Tetrarchy between rival claimants for control of the empire, in which he was defeate ...

crosses the Bosphorus 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 ...

. He captures the city after eight days. *

Battle of Tzirallum The Battle of Tzirallum was part of the civil wars of the Tetrarchy fought on 30 April 313 between the Roman armies of emperors Licinius and Maximinus. The battle location was on the "Campus Serenus" at Tzirallum, identified as the modern-day t ...

: 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 The Cilician Gates or Gülek Pass is a pass through the Taurus Mountains connecting the low plains of Cilicia to the Anatolian Plateau, by way of the narrow gorge of the Gökoluk River. Its highest elevation is about 1000m. The Cilician Gates ha ...

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 th ...

' 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 Galeria Valeria (died 315) was the daughter of Roman Emperor Diocletian and wife of his co-emperor Galerius. Biography Born as Valeria to Diocletian and Prisca, she married Galerius in 293, when her father elevated him to the position of Caesar ...

go into hiding.

Asia

* March 14 –

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 The Han Zhao (; 304–329 AD), or Former Zhao (), was a dynastic state of China ruled by the Xiongnu people during the Sixteen Kingdoms period of Chinese history. In Chinese historiography, it was given two conditional state titles, the Northern ...

). 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 S ...

, his uncle Huai of Jin and becomes the new emperor of the Jin Dynasty. * Nintoku, the fourth son of Ōjin, becomes the 16th emperor of Japan.

By topic

Art and Science

* Basilica of Maxentius and Constantine (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 –

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 convert to Christianity. Born in Naissus, Dacia Mediterran ...

and co-emperor

meet at a conference in

(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 ...

– 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 ...

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 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 religiou ...

Births

* Cyril of Jerusalem, 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 11 ...

) *

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 Constantinop ...

, 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 millenniu ...

) *

Shi Hong Shi Hong (石弘) (313–334), courtesy name Daya (大雅), was briefly an emperor of the Jie-led Later Zhao dynasty of China after the death of his father Shi Le, Later Zhao's founder. Because after his cousin Shi Hu deposed him, he was created ...

, 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

* March 14 – 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 Achillas ( el, Ἀχιλλᾶς) was one of the guardians of the Egyptian king Ptolemy XIII Theos Philopator, and commander of the king's troops, when Pompey fled to Egypt in 48 BC. He was called by Julius Caesar a man of extraordinary daring, a ...

(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, Alexandri ...

* 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 10 ...

) *

Candidianus (son of Galerius) Candidianus (c. 296–313) was the son of the Roman Emperor Galerius and adoptive son of Galeria Valeria, the wife of Galerius and daughter of Diocletian. Life and execution Candidianus was the son of Galerius and a concubine whose name has not ...

* Severianus, son of

* Guangxian, Chinese empress of the

state * Zhang Huiguang (or Wuxiao), Chinese empress

References

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