Year 287 ( CCLXXXVII) was a

common year starting on Saturday A common year starting on Saturday is any non-leap year (i.e. a year with 365 days) that begins on Saturday, 1 January, and ends on Saturday, 31 December. Its dominical letter hence is B. The most recent year of such kind was 2022, and the next ...

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 Diocletian and Maximian (or, less frequently, year 1040 ''

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 287 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

* On the same day that he is made

consul Consul (abbrev. ''cos.''; Latin plural ''consules'') was the title of one of the two chief magistrates of the Roman Republic, and subsequently also an important title under the Roman Empire. The title was used in other European city-states thro ...

Maximian Maximian (; ), nicknamed Herculius, was Roman emperor from 286 to 305. He was ''Caesar (title), Caesar'' from 285 to 286, then ''Augustus (title), Augustus'' from 286 to 305. He shared the latter title with his co-emperor and superior, Diocleti ...

launches a campaign against an invasion of Gaul by the

Alemanni The Alemanni or Alamanni were a confederation of Germanic peoples, Germanic tribes * * * on the Upper Rhine River during the first millennium. First mentioned by Cassius Dio in the context of the campaign of Roman emperor Caracalla of 213 CE ...

. After defeating this invasion, he then invades Alemannia itself, entering across the Upper Rhine and returning to Roman territory via the Upper Danube. * Around this time, the future emperor

Constantius Constantius may refer to: __NOTOC__ Roman people * Constantius I "Chlorus" (–306), Western Roman emperor from 305 to 306 * Julius Constantius (died 337), consul in 335, son of Constantius I * Constantius Gallus (325–354), ''caesar'' from 351 to ...

defeats and captures a Germanic king, the latter having prepared an ambush against the Romans. * Diocletian signs a peace treaty with King Bahram II of

Persia Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the nort ...

, and installs the pro-Roman Arsacid Tiridates III as king over the western portion of

Armenia Armenia, officially the Republic of Armenia, is a landlocked country in the Armenian Highlands of West Asia. It is a part of the Caucasus region and is bordered by Turkey to the west, Georgia (country), Georgia to the north and Azerbaijan to ...

. * Diocletian re-organizes the

Mesopotamia Mesopotamia is a historical region of West Asia situated within the Tigris–Euphrates river system, in the northern part of the Fertile Crescent. Today, Mesopotamia is known as present-day Iraq and forms the eastern geographic boundary of ...

n frontier, and fortifies various locations including the city of

Circesium Circesium ( ', ), known in Arabic as al-Qarqisiya, was a Roman fortress city near the junction of the Euphrates and Khabur rivers, located at the empire's eastern frontier with the Sasanian Empire. Procopius calls it the "farthest fortress" (φ ...

(modern Busayrah) on the

Euphrates The Euphrates ( ; see #Etymology, below) is the longest and one of the most historically important rivers of West Asia. Tigris–Euphrates river system, Together with the Tigris, it is one of the two defining rivers of Mesopotamia (). Originati ...

. Around this time, he begins the construction of the

Strata Diocletiana The ''Strata Diocletiana'' (Latin for "Road of Diocletian") was a fortified road that ran along the eastern desert border, the ''limes Arabicus'', of the Roman Empire. As its name suggests and as it appears on milestones, it was constructed under ...

. Throughout his reign, similar fortification efforts are conducted on the other frontiers as well, with fortifications constructed or restored behind, on and beyond the borders. Conscription and the number of legions increase, although the legions themselves are reformed into smaller and more flexible units. At some point in time, Diocletian may have also established the late Roman military system of

Comitatenses The ''comitatenses'' and later the '' palatini'' were the units of the field armies of the late Roman Empire. They were the soldiers that replaced the legionaries, who had formed the backbone of the Roman military since the late republic. Org ...

(field army units) and

Limitanei The ''limitanei'' (Latin, also called ''ripenses''), meaning respectively "the soldiers in frontier districts" (from the Latin word '' limes'' meaning frontier) or "the soldiers on the riverbank" (from the Rhine and Danube), were an important par ...

(border units), but some scholars date this development to the reign of

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 ...

(r. 306–337). * September – The first

Indiction An indiction (, impost) was a periodic reassessment of taxation in the Roman Empire which took place every fifteen years. In Late Antiquity, this 15-year cycle began to be used to date documents and it continued to be used for this purpose in Med ...

begins.

Births

Deaths

* Justa and Rufina, Christian martyrs * Maurice (or Mauritius), Christian martyr * Quentin, Christian missionary and martyr * Valerius and Rufinus, Christian martyrs *

Victoricus, Fuscian, and Gentian Victoricus (or Victorice, Victoric), Fuscian (or Fulcian, Fulcien, Fuscien) and Gentian (or Gentien) (died circa 287–303) were three Christian martyrs later venerated as Roman Catholic saints. Their feast day falls on 11 December. Hagiography A ...

, Christian martyrs

References

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