__NOTOC__ Year 312 ( CCCXII) was a leap year starting on Tuesday of the

Julian calendar The Julian calendar is a solar calendar of 365 days in every year with an additional leap day every fourth year (without exception). The Julian calendar is still used as a religious calendar in parts of the Eastern Orthodox Church and in parts ...

. In the

Roman Empire The Roman Empire ruled the Mediterranean and much of Europe, Western Asia and North Africa. The Roman people, Romans conquered most of this during the Roman Republic, Republic, and it was ruled by emperors following Octavian's assumption of ...

, it was known as the Year of the Consulship of Constantinus and Licinianus (or, less frequently, year 1065 ''

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

''). The denomination 312 for this year has been used since the early medieval period, when the

Anno Domini The terms (AD) and before Christ (BC) are used when designating years in the Gregorian calendar, Gregorian and Julian calendar, Julian calendars. The term is Medieval Latin and means "in the year of the Lord" but is often presented using "o ...

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, the current year is numbered in the Gregorian calendar, which numbers its years in the Western Christian era ...

became the prevalent method in Europe for naming years.

Events

By place

Roman Empire

Constantine I Constantine I (27 February 27222 May 337), also known as Constantine the Great, was a Roman emperor from AD 306 to 337 and the first Roman emperor to convert to Christianity. He played a Constantine the Great and Christianity, pivotal ro ...

crosses the

Cottian Alps The Cottian Alps (; ; ) are a mountain range in the southwestern part of the Alps. They form the border between France (Hautes-Alpes and Savoie) and Italy (Piedmont). The Fréjus Road Tunnel and Fréjus Rail Tunnel between Modane and Susa, Ital ...

with an army (40,000 men) and defeats

Maxentius Marcus Aurelius Valerius Maxentius ( 283 – 28 October 312) was a Roman emperor from 306 until his death in 312. Despite ruling in Italy and North Africa, and having the recognition of the Senate in Rome, he was not recognized as a legitimate ...

's generals in three battles at

Turin Turin ( , ; ; , then ) is a city and an important business and cultural centre in northern Italy. It is the capital city of Piedmont and of the Metropolitan City of Turin, and was the first Italian capital from 1861 to 1865. The city is main ...

Brescia Brescia (, ; ; or ; ) is a city and (municipality) in the region of Lombardy, in Italy. It is situated at the foot of the Alps, a few kilometers from the lakes Lake Garda, Garda and Lake Iseo, Iseo. With a population of 199,949, it is the se ...

and

Verona Verona ( ; ; or ) is a city on the Adige, River Adige in Veneto, Italy, with 255,131 inhabitants. It is one of the seven provincial capitals of the region, and is the largest city Comune, municipality in the region and in Northeast Italy, nor ...

. Maxentius's Praetorian Prefect Ruricius Pompeianus is killed in the fighting outside Verona. *

October 28 Events Pre-1600 * 97 – Roman emperor Nerva is forced by the Praetorian Guard to adopt general Marcus Ulpius Trajanus as his heir and successor. * 306 – Maxentius is proclaimed Roman emperor. * 312 – Constantine I defeat ...

–

Battle of the Milvian Bridge The Battle of the Milvian Bridge took place between the Roman Emperors Constantine the Great, Constantine I and Maxentius on 28 October AD 312. It takes its name from the Milvian Bridge, an important route over the Tiber. Constantine won the batt ...

: Constantine defeats Maxentius at the Milvian Bridge, becoming the only Roman emperor in the West. Prior to the battle, he reportedly has a vision of a cross (''

labarum The labarum ( or λάβουρον) was a '' vexillum'' (military standard) that displayed the "Chi-Rho" symbol ☧, a christogram formed from the first two Greek letters of the word "Christ" (, or Χριστός) – '' Chi'' (χ) and ''Rho'' (� ...

'') with the phrase ''"

in hoc signo vinces "" is a Latin phrase conventionally translated into English as "In this sign thou shalt conquer", often also being translated as "By and/or in this sign, conquer". The Latin phrase itself renders, rather loosely, the Greek phrase "", translit ...

"'' ("In this sign you shall conquer"). This encourages him to convert to

Christianity Christianity is an Abrahamic monotheistic religion, which states that Jesus in Christianity, Jesus is the Son of God (Christianity), Son of God and Resurrection of Jesus, rose from the dead after his Crucifixion of Jesus, crucifixion, whose ...

. *

October 29 Events Pre-1600 * 312 – Constantine the Great enters Rome after his victory at the Battle of the Milvian Bridge, stages a grand '' adventus'' in the city, and is met with popular jubilation. Maxentius' body is fished out of the Tiber ...

– Constantine enters

Rome Rome (Italian language, Italian and , ) is the capital city and most populated (municipality) of Italy. It is also the administrative centre of the Lazio Regions of Italy, region and of the Metropolitan City of Rome. A special named with 2, ...

; he stages a grand '' adventus'' in the city, and is met with popular jubilation. Maxentius' body is fished out of the

Tiber The Tiber ( ; ; ) is the List of rivers of Italy, third-longest river in Italy and the longest in Central Italy, rising in the Apennine Mountains in Emilia-Romagna and flowing through Tuscany, Umbria, and Lazio, where it is joined by the R ...

and decapitated. * Constantine forges an

alliance An alliance is a relationship among people, groups, or sovereign state, states that have joined together for mutual benefit or to achieve some common purpose, whether or not an explicit agreement has been worked out among them. Members of an a ...

with co-emperor

Licinius Valerius Licinianus Licinius (; Ancient Greek, Greek: Λικίνιος; 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 that ...

, and offers him his half-sister, Constantia, in marriage. The

Praetorian Guard The Praetorian Guard (Latin language, Latin: ''cohortes praetoriae'') was the imperial guard of the Imperial Roman army that served various roles for the Roman emperor including being a bodyguard unit, counterintelligence, crowd control and ga ...

and Imperial Horse Guard ('' equites singulares Augusti'') are disbanded. * Emperor

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

campaigns unsuccessfully against the

Armenians Armenians (, ) are an ethnic group indigenous to the Armenian highlands of West Asia.Robert Hewsen, Hewsen, Robert H. "The Geography of Armenia" in ''The Armenian People From Ancient to Modern Times Volume I: The Dynastic Periods: From Antiq ...

By topic

Religion

* Constantine I adopts the words ''"in hoc signo vinces"'' as a motto, and has the letters X and P (the first letters of the Greek word

Christ Jesus ( AD 30 or 33), also referred to as Jesus Christ, Jesus of Nazareth, and many other names and titles, was a 1st-century Jewish preacher and religious leader. He is the Jesus in Christianity, central figure of Christianity, the M ...

) emblazoned on the shields of his soldiers. * The

Council of Carthage The Councils of Carthage were church synods held during the 3rd, 4th, and 5th centuries in the city of Carthage in Africa. The most important of these are described below. Synod of 251 In May 251 a synod, assembled under the presidency of Cyprian ...

supports

Donatism Donatism was a schism from the Catholic Church in the Archdiocese of Carthage from the fourth to the sixth centuries. Donatists argued that Christianity, Christian clergy must be faultless for their ministry to be effective and their prayers and ...

, which espouses a rigorous application and interpretation of the sacraments. These doctrines will be condemned by the Council of Arles (314). * Constantine I promotes a policy of state sponsorship of Christianity, perhaps even becoming a Christian himself (see

Constantine the Great and Christianity During the reign of the Roman emperor Constantine the Great (306–337 AD), Christianity began to transition to the dominant religion of the Roman Empire. Historians remain uncertain about Constantine's reasons for favoring Christianity, and ...

Births

* Dao'an, Chinese Buddhist monk and writer (d. 385) * Huan Wen (or Yuanzi), Chinese general (d. 373)

Deaths

–

, Roman emperor (b.

283 Year 283 ( CCLXXXIII) was a common year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Carus and Carinus (or, less frequently, year 1036 ''Ab urbe condita''). The denomination 283 for this y ...

) * Clement of Ancyra, Christian bishop and martyr * Guo Xiang, Chinese scholar and philosopher (b. 252) * Huyan, Chinese empress of the

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

state * Ruricius Pompeianus, Roman

praetorian prefect The praetorian prefect (; ) was a high office in the Roman Empire. Originating as the commander of the Praetorian Guard, the office gradually acquired extensive legal and administrative functions, with its holders becoming the Emperor's chief ai ...

References

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