__NOTOC__ Year 364 ( CCCLXIV) was a

leap year starting on Thursday A leap year starting on Thursday is any year with 366 days (i.e. it includes 29 February) that begins on Thursday 1 January, and ends on Friday 31 December. Its dominical letters hence are DC. The most recent year of such kind was 2004, and the n ...

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 ...

. At the time, it was known as the Year of the Consulship of Augustus and Varronianus (or, less frequently, year 1117 ''

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 364 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

February 17 Events Pre-1600 * 1370 – Northern Crusades: Grand Duchy of Lithuania and the Teutonic Knights meet in the Battle of Rudau. * 1411 – Following the successful campaigns during the Ottoman Interregnum, Musa Çelebi, one of the sons ...

– Emperor

Jovian Jovian is the adjectival form of Jupiter and may refer to: * Jovian (emperor) (Flavius Iovianus Augustus), Roman emperor (363–364 AD) * Jovians and Herculians, Roman imperial guard corps * Jovian (lemur), a Coquerel's sifaka known for ''Zobooma ...

dies after a reign of eight months. He is found dead in his tent at

Tyana Tyana, earlier known as Tuwana during the Iron Age, and Tūwanuwa during the Bronze Age, was an ancient city in the Anatolian region of Cappadocia, in modern Kemerhisar, Niğde Province, Central Anatolia, Turkey. It was the capital of a Luwia ...

(

Asia Minor Anatolia (), also known as Asia Minor, is a peninsula in West Asia that makes up the majority of the land area of Turkey. It is the westernmost protrusion of Asia and is geographically bounded by the Mediterranean Sea to the south, the Aegean ...

) en route back to

Constantinople Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...

, in suspicious circumstances. *

February 26 Events Pre-1600 * 747 BC – According to Ptolemy, the epoch (origin) of the Nabonassar Era began at noon on this date. Historians use this to establish the modern BC chronology for dating historic events. * 320 – Chandragupta ...

–

Valentinian I Valentinian I (; 32117 November 375), also known as Valentinian the Great, was Roman emperor from 364 to 375. He ruled the Western Roman Empire, Western half of the empire, while his brother Valens ruled the Byzantine Empire, East. During his re ...

is proclaimed Emperor by officers of the

Roman army The Roman army () served ancient Rome and the Roman people, enduring through the Roman Kingdom (753–509 BC), the Roman Republic (509–27 BC), and the Roman Empire (27 BC–AD 1453), including the Western Roman Empire (collapsed Fall of the W ...

Nicaea Nicaea (also spelled Nicæa or Nicea, ; ), also known as Nikaia (, Attic: , Koine: ), was an ancient Greek city in the north-western Anatolian region of Bithynia. It was the site of the First and Second Councils of Nicaea (the first and seve ...

Bithynia Bithynia (; ) was an ancient region, kingdom and Roman province in the northwest of Asia Minor (present-day Turkey), adjoining the Sea of Marmara, the Bosporus, and the Black Sea. It bordered Mysia to the southwest, Paphlagonia to the northeast a ...

. He addresses the soldiers (who threaten to riot) in a speech. He founds the

Valentinianic dynasty The Valentinian dynasty, commonly known as the Valentinianic dynasty, was a ruling house of five generations of dynasts, including five Roman emperors during late antiquity, lasting nearly a hundred years from the mid fourth to the mid fifth ...

and rules the Western portion of 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 ...

, from

Caledonia Caledonia (; ) was the Latin name used by the Roman Empire to refer to the forested region in the central and western Scottish Highlands, particularly stretching through parts of what are now Lochaber, Badenoch, Strathspey, and possibly as ...

(

Scotland Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...

) to the

Rhine The Rhine ( ) is one of the List of rivers of Europe, major rivers in Europe. The river begins in the Swiss canton of Graubünden in the southeastern Swiss Alps. It forms part of the Swiss-Liechtenstein border, then part of the Austria–Swit ...

frontier, ensuring it a few years of relative security. He settles in

Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...

and establishes a militia to defend the region. *

March 28 Events Pre-1600 * AD 37 – Roman emperor Caligula accepts the titles of the Principate, bestowed on him by the Senate. * 193 – After assassinating the Roman Emperor Pertinax, his Praetorian Guards auction off the throne to Did ...

–

Valens Valens (; ; 328 – 9 August 378) was Roman emperor from 364 to 378. Following a largely unremarkable military career, he was named co-emperor by his elder brother Valentinian I, who gave him the Byzantine Empire, eastern half of the Roman Em ...

, brother of Valentinian I, is appointed co-emperor (''

Augustus Gaius Julius Caesar Augustus (born Gaius Octavius; 23 September 63 BC – 19 August AD 14), also known as Octavian (), was the founder of the Roman Empire, who reigned as the first Roman emperor from 27 BC until his death in A ...

'') in the palace of Hebdomon (

Turkey Turkey, officially the Republic of Türkiye, is a country mainly located in Anatolia in West Asia, with a relatively small part called East Thrace in Southeast Europe. It borders the Black Sea to the north; Georgia (country), Georgia, Armen ...

). He rules the Eastern portion of the

, from the

Danube The Danube ( ; see also #Names and etymology, other names) is the List of rivers of Europe#Longest rivers, second-longest river in Europe, after the Volga in Russia. It flows through Central and Southeastern Europe, from the Black Forest sou ...

to the Persian border, and begins the first anti-

pagan Paganism (, later 'civilian') is a term first used in the fourth century by early Christians for people in the Roman Empire who practiced polytheism, or ethnic religions other than Christianity, Judaism, and Samaritanism. In the time of the ...

persecutions. *

Britain Britain most often refers to: * Great Britain, a large island comprising the countries of England, Scotland and Wales * The United Kingdom of Great Britain and Northern Ireland, a sovereign state in Europe comprising Great Britain and the north-eas ...

is forced to endure fierce barbarian raids.

By topic

Religion

* The

Council of Laodicea The Council of Laodicea was a regional Christian synod of approximately thirty clerics from Asia Minor which assembled about 363–364 in Laodicea, Phrygia Pacatiana. Historical context The council took place soon after the conclusion of the wa ...

decides some disciplinary questions of the church and attempts to establish the

Biblical canon A biblical canon is a set of texts (also called "books") which a particular Jewish or Christian religious community regards as part of the Bible. The English word ''canon'' comes from the Ancient Greek, Greek , meaning 'ruler, rule' or 'measu ...

, but fails.

Science

Theon of Alexandria Theon of Alexandria (; ; ) was a Greek scholar and mathematician who lived in Alexandria, Egypt. He edited and arranged Euclid's '' Elements'' and wrote commentaries on works by Euclid and Ptolemy. His daughter Hypatia also won fame as a mathema ...

, Greek

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, mathematical structure, structure, space, Mathematica ...

, observes a

solar eclipse A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby obscuring the view of the Sun from a small part of Earth, totally or partially. Such an alignment occurs approximately every six months, during the eclipse season i ...

(

June 16 Events Pre-1600 * 632 – Yazdegerd III ascends the throne as king (''shah'') of the Persian Empire. He becomes the last ruler of the Sasanian dynasty (modern Iran). *1407 – Ming–Hồ War: Retired King Hồ Quý Ly and his son K ...

) and a

lunar eclipse A lunar eclipse is an astronomical event that occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. Such an alignment occurs during an eclipse season, approximately every six months, during the full moon phase, ...

(

November 25 Events Pre-1600 *571 BC – Servius Tullius, king of Ancient Rome, Rome, celebrates the first of his three Roman triumph, triumphs for his victory over the Etruscans. *1034 – Máel Coluim II of Scotland, Máel Coluim mac Cináeda, Ki ...

). He gains some renown for his version of Euclid's ''Elements'' and his commentaries on Ptolemy's ''Almagest''.

Births

Blaesilla Blaesilla, also known as Blesilla (364–384), was a Roman widow and disciple of Jerome. She was born into a wealthy senatorial family in Rome, the eldest daughter of Paula of Rome and sister of Eustochium, who were members of a group of wealth ...

, Roman noblewoman (d.

384 __NOTOC__ Year 384 (Roman numerals, CCCLXXXIV) was a leap year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Richomeres, Ricomer and Clearchus (consul), Clearchus (or, less frequently, ye ...

) *

Huiguo Huiguo () (746–805) was a Buddhist monk of Tang China who studied and taught Chinese Esoteric Buddhism, a Vajrayana tradition recently imported from India. Later Huiguo would become the teacher of Kūkai, founder of Shingon Buddhism, a promine ...

, Chinese

Buddhist Buddhism, also known as Buddhadharma and Dharmavinaya, is an Indian religion and List of philosophies, philosophical tradition based on Pre-sectarian Buddhism, teachings attributed to the Buddha, a wandering teacher who lived in the 6th or ...

nun (d.

433 Year 433 ( CDXXXIII) was a common year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Theodosius and Maximus (or, less frequently, year 1186 ''Ab urbe condita''). The denomination 433 for ...

) *

Sima Daozi Sima Daozi (司馬道子) (363 – 3 February 403), courtesy name Daozi (道子), formally Prince Wenxiao of Kuaiji (會稽文孝王), was a regent during the reign of his nephew Emperor An of Jin, being the younger brother of Emperor Xiaowu. E ...

, Chinese prince and

regent In a monarchy, a regent () is a person appointed to govern a state because the actual monarch is a minor, absent, incapacitated or unable to discharge their powers and duties, or the throne is vacant and a new monarch has not yet been dete ...

(d.

403 Year 403 ( CDIII) was a common year starting on Thursday of the Julian calendar. At the time, it was known as the Year of the Consulship of Theodosius and Rumoridus (or, less frequently, year 1156 ''Ab urbe condita''). The denomination 403 fo ...

) *

Xu Xianzhi Xu Xianzhi (徐羨之) (364 – 8 February 426), courtesy name Zongwen (宗文), was a high-level official of the Chinese Liu Song dynasty, who, along with his colleagues Fu Liang and Xie Hui, deposed Emperor Shao after the death of Emperor Wu ...

, Chinese official and regent (d.

426 __NOTOC__ Year 426 (Roman numerals, CDXXVI) was a common year starting on Friday of the Julian calendar. At the time, it was known in Rome as the Year of the Consulship of Theodosius II, Theodosius and Valentinian III, Valentinianus (or, less ...

)

Deaths

–

, Roman emperor (b.

331 __NOTOC__ Year 331 ( CCCXXXI) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Bassus and Ablabius (or, less frequently, year 1084 ''Ab urbe condita''). The denomination ...

) *

Ge Hong Ge Hong (; b. 283 – d. 343 or 364), courtesy name Zhichuan (稚川), was a Chinese linguist, philosopher, physician, politician, and writer during the Eastern Jin dynasty. He was the author of '' Essays on Chinese Characters'', the '' Baopu ...

, Chinese scholar and

taoist Taoism or Daoism (, ) is a diverse philosophical and religious tradition indigenous to China, emphasizing harmony with the Tao ( zh, p=dào, w=tao4). With a range of meaning in Chinese philosophy, translations of Tao include 'way', 'road', ...

(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 ...

) *

Theophilos the Indian Theophilos the Indian, also known as Theophilus Indus () (died 364), also called "the Ethiopian", was an Aetian or Heteroousian bishop who fell alternately in and out of favor with the court of the Roman emperor Constantius II. He is mentioned in ...

, Christian bishop

References

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