__NOTOC__ Year 306 ( CCCVI) was a common year starting on Tuesday (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 Constantius and Valerius (or, less frequently, year 1059 '' Ab urbe condita''). The denomination 306 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.

Events

By place

Roman Empire

July 25 Events Pre-1600 * 306 – Constantine I is proclaimed Roman emperor by his troops. * 315 – The Arch of Constantine is completed near the Colosseum in Rome to commemorate Constantine I's victory over Maxentius at the Milvian Bridge. ...

–

Constantius I Flavius Valerius Constantius "Chlorus" ( – 25 July 306), also called Constantius I, was Roman emperor from 305 to 306. He was one of the four original members of the Tetrarchy established by Diocletian, first serving as caesar from 293 t ...

dies outside

Eboracum Eboracum () was a fort and later a city in the Roman province of Britannia. In its prime it was the largest town in northern Britain and a provincial capital. The site remained occupied after the decline of the Western Roman Empire and ultimat ...

(modern-day

York York is a cathedral city with Roman origins, sited at the confluence of the rivers Ouse and Foss in North Yorkshire, England. It is the historic county town of Yorkshire. The city has many historic buildings and other structures, such as a ...

). Constantine, aged 23 or 24, is declared emperor by his troops. Emperor

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 ...

grants Constantine the title of

Caesar Gaius Julius Caesar (; ; 12 July 100 BC – 15 March 44 BC), was a Roman general and statesman. A member of the First Triumvirate, Caesar led the Roman armies in the Gallic Wars before defeating his political rival Pompey in a civil war, an ...

, and elevates

Flavius 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 ...

to emperor of the

Western Roman Empire The Western Roman Empire comprised the western provinces of the Roman Empire at any time during which they were administered by a separate independent Imperial court; in particular, this term is used in historiography to describe the period ...

. * Constantine institutes toleration of the

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 his territories. * Constantine establishes his capital in

Augusta Treverorum Trier in Rhineland-Palatinate, whose history dates to the Roman Empire, is often claimed to be the oldest city in Germany. Traditionally it was known in English by its French name of Treves. Prehistory The first traces of human settlement in ...

(

Trier Trier ( , ; lb, Tréier ), formerly known in English as Trèves ( ;) and Triers (see also names in other languages), is a city on the banks of the Moselle in Germany. It lies in a valley between low vine-covered hills of red sandstone in the ...

). He begins a major expansion of the city, strengthening the

walls Walls may refer to: *The plural of wall, a structure *Walls (surname), a list of notable people with the surname Places * Walls, Louisiana, United States * Walls, Mississippi, United States * Walls, Ontario, neighborhood in Perry, Ontario, C ...

, expanding the palace complex and building the Imperial Baths. * Building on the efforts of Diocletian, Galerius introduces the poll tax to central and southern Italy and truncates the size of the

Praetorian Guard The Praetorian Guard (Latin: ''cohortēs praetōriae'') was a unit of the Imperial Roman army that served as personal bodyguards and intelligence agents for the Roman emperors. During the Roman Republic, the Praetorian Guard were an escort fo ...

, with plans to disband the Guard altogether. *

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 defe ...

– Maxentius, son of former Western Emperor Maximian, leads a revolt by the

and members of the Senate 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 ...

, and is proclaimed Emperor. Southern Italy supports Maxentius, as do

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

, Corsica,

Sardinia Sardinia ( ; it, Sardegna, label=Italian, Corsican and Tabarchino ; sc, Sardigna , sdc, Sardhigna; french: Sardaigne; sdn, Saldigna; ca, Sardenya, label=Algherese and Catalan) is the second-largest island in the Mediterranean Sea, after ...

and

Sicily (man) it, Siciliana (woman) , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = Ethnicity , demographics1_footnotes = , demographi ...

. Maxentius recalls Maximian from retirement, who joins his son in Rome. * Winter: Constantine fights with success against the

Franks The Franks ( la, Franci or ) were a group of Germanic peoples whose name was first mentioned in 3rd-century Roman sources, and associated with tribes between the Lower Rhine and the Ems River, on the edge of the Roman Empire.H. Schutz: Tools, ...

. * Galerius has the Rotunda of Galerius built in

Thessaloniki Thessaloniki (; el, Θεσσαλονίκη, , also known as Thessalonica (), Saloniki, or Salonica (), is the second-largest city in Greece, with over one million inhabitants in its metropolitan area, and the capital of the geographic region of ...

( Macedonia).

Asia

* The

War of the Eight Princes The War of the Eight Princes, Rebellion of the Eight Kings, or Rebellion of the Eight Princes () was a series of civil wars among kings/princes (Chinese: ''wáng'' 王) of the Chinese Jin dynasty from 291 to 306 AD. The key point of contention in ...

ends in China.

By topic

Religion

* The

Synod of Elvira The Synod of Elvira ( la, Concilium Eliberritanum, es, Concilio de Elvira) was an ecclesiastical synod held at Elvira in the Roman province of Hispania Baetica, now Granada in southern Spain.. Its date has not been exactly determined but is belie ...

concludes with the issue of various

canon Canon or Canons may refer to: Arts and entertainment * Canon (fiction), the conceptual material accepted as official in a fictional universe by its fan base * Literary canon, an accepted body of works considered as high culture ** Western ca ...

s, including one declaring that killing through a magic spell is a sin and the work of the devil. * Metrophanes becomes

bishop of Byzantium The ecumenical patriarch ( el, Οἰκουμενικός Πατριάρχης, translit=Oikoumenikós Patriárchēs) is the archbishop of Constantinople (Istanbul), New Rome and ''primus inter pares'' (first among equals) among the heads of the ...

. * The

Patriarchate of Lisbon The Patriarchate of Lisbon ( la, Patriarchatus Olisiponensis) is a Latin Church ecclesiastical territory or patriarchal archdiocese of the Catholic Church in Lisbon, the capital of Portugal. Its archiepiscopal see is the Patriarchal Cathedral of ...

is established. * Christianity is established in

Roman Britain Roman Britain was the period in classical antiquity when large parts of the island of Great Britain were under occupation by the Roman Empire. The occupation lasted from AD 43 to AD 410. During that time, the territory conquered wa ...

. British bishops participate in the councils of

Arles Arles (, , ; oc, label= Provençal, Arle ; Classical la, Arelate) is a coastal city and commune in the South of France, a subprefecture in the Bouches-du-Rhône department of the Provence-Alpes-Côte d'Azur region, in the former province of ...

(

314 __NOTOC__ Year 314 ( CCCXIV) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Rufius and Annianus (or, less frequently, year 1067 '' ...

Nicaea Nicaea, also known as Nicea or Nikaia (; ; grc-gre, Νίκαια, ) was an ancient Greek city in Bithynia, where located in northwestern Anatolia and is primarily known as the site of the First and Second Councils of Nicaea (the first and s ...

(

325 __NOTOC__ Year 325 ( CCCXXV) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Proculus and Paulinus (or, less frequently, year 1078 '' Ab urbe condita''). The denomination ...

) and Arminum (

349 __NOTOC__ Year 349 ( CCCXLIX) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Limenius and Catullinus (or, less frequently, year 1102 ...

Births

* Ephrem the Syrian, Syriac theologian and hymnodist (d. 373)

Deaths

* February 17 –

Theodore of Amasea : ''For another Saint Theodore, see: Theodore Stratelates or Saint Theodore (disambiguation)''. Saint Theodore Tiron ( grc-gre, Ἅγιος Θεόδωρος Τήρων) is one of the two recognized saints called Theodore who are venerated as ...

, Roman soldier and

martyr A martyr (, ''mártys'', "witness", or , ''marturia'', stem , ''martyr-'') is someone who suffers persecution and death for advocating, renouncing, or refusing to renounce or advocate, a religious belief or other cause as demanded by an externa ...

March 4 Events Pre-1600 *AD 51 – Nero, later to become Roman emperor, is given the title '' princeps iuventutis'' (head of the youth). * 306 – Martyrdom of Saint Adrian of Nicomedia. * 852 – Croatian Knez Trpimir I issues a st ...

– Adrian and Natalia of Nicomedia, Christian martyrs *

–

Constantius Chlorus Flavius Valerius Constantius "Chlorus" ( – 25 July 306), also called Constantius I, was Roman emperor from 305 to 306. He was one of the four original members of the Tetrarchy established by Diocletian, first serving as caesar from 293 ...

, Roman emperor (b. c.

250 __NOTOC__ Year 250 (Roman numerals, CCL) 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 Traianus and Gratus (or, less frequently, y ...

) *

August 25 Events Pre-1600 * 19 – The Roman general Germanicus dies near Antioch. He was convinced that the mysterious illness that ended in his death was a result of poisoning by the Syrian governor Gnaeus Calpurnius Piso, whom he had ordered to ...

– Maginus, Christian hermit and martyr *

Demetrius of Thessaloniki Saint Demetrius (or Demetrios) of Thessalonica ( el, Ἅγιος Δημήτριος τῆς Θεσσαλονίκης, (); bg, Димитър Солунски (); mk, Свети Димитрија Солунски (); ro, Sfântul Dumitru; sr ...

, Roman soldier and martyr *

Sima Ying Sima Ying (司馬穎) (279 – December 306), courtesy name Zhangdu (章度), was a Jin Dynasty (266–420) imperial prince who served briefly as his brother Emperor Hui's regent and crown prince. He was the sixth of eight princes commonly asso ...

, Chinese prince of the Jin Dynasty (b. 279) *

Sima Yong Sima Yong (司馬顒) (before 274 - late January 307), courtesy name Wenzai (文載), was a Jin dynasty imperial prince and briefly a regent for Emperor Hui. He was the seventh of eight princes commonly associated with the War of the Eight Pr ...

(or Wenzai), Chinese prince and

regent A regent (from Latin : ruling, governing) is a person appointed to govern a state '' pro tempore'' (Latin: 'for the time being') because the monarch is a minor, absent, incapacitated or unable to discharge the powers and duties of the monarchy ...

References

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