* 286 – Emperor Diocletian elevates his general Maximian to co-emperor with the rank of Augustus and gives him control over the Western regions of the Roman Empire.

In his Easter table the year 532 AD was equated with the regnal year 248 of Emperor Diocletian.

Palace of the Roman Emperor Diocletian, around which the Croatian city of Split ( city ) | Split emerged.

Dalmatia was the birthplace of the Roman Emperor Diocletian, who, upon retirement from Emperor in AD 305, built a large palace near Salona, out of which the city of Split later developed.

Diocletian (; c. 22 December 244 – 3 December 311 ), was a Roman Emperor from 284 to 305.

Born to a family of low status in the Roman province of Dalmatia, Diocletian rose through the ranks of the military to become cavalry commander to the Emperor Carus.

After the deaths of Carus and his son Numerian on campaign in Persia, Diocletian was proclaimed Emperor.

Diocletian publicly humiliated Galerius, forcing him to walk for a mile at the head of the Imperial caravan, still clad in the purple robes of the Emperor.

In addition to his administrative and legal impact on history, the Emperor Diocletian is considered to be the founder of the city of Split in modern-day Croatia.

* Ruins of the Palace of the Emperor Diocletian at Spalatro in Dalmatia By Robert Adam, 1764.

* 244 – Diocletian, Roman Emperor ( d. 311 )

The Principate ( 27 BC-284 AD ) period was succeeded by what is known as the Dominate ( 284 AD-527 AD ), during which Emperor Diocletian tried to put the Empire on a more formal footing.

* 303 – Diocletian, Roman Emperor, publishes his edict that begins the persecution of Christians in his portion of the Empire.

* 303 – Roman Emperor Diocletian orders the destruction of the Christian church in Nicomedia, beginning eight years of Diocletianic Persecution.

The Emperor Diocletian is said to have made Florentia the seat of a bishopric around the beginning of the 4th century AD, but this seems improbable as Diocletian was a notable persecutor of Christians.

When the governing of the Empire became too cumbersome for a single Emperor, the empire was divided by the emperor Diocletian into the Western and Eastern empires.

Similarly, in an edict of the Emperor Diocletian from AD 303, which set maximum prices of goods and services, the price of saddles, halters, and bridles are enumerated, as well as the price of a veterinarian for " cutting the hair and hoof of each animal.

As part of his reorganization of the empire in 300 AD, the Emperor Diocletian separated the administration of Crete from Cyrenaica and in the latter formed the new provinces of " Upper Libya " and " Lower Libya ", using the term Libya for the first time as an administrative designation.

At the request of Roman Emperor Diocletian, he became an official professor of rhetoric in Nicomedia, the voyage from Africa described in his poem Hodoeporicum.

The Emperor Diocletian ( r. 284 – 305 ) split the empire into separately administered eastern and western halves in 286 ; however, the empire was not considered divided by its inhabitants or rulers, as legal and administrative promulgations in one division were considered valid in the other.

* 305 – Diocletian and Maximian retire from the office of Roman Emperor.

* 304 – Roman Emperor Diocletian orders the beheading of the 14-year-old Pancras of Rome.

* 308 – At Carnuntum, Emperor emeritus Diocletian confers with Galerius, Augustus of the East, and Maximianus, the recently returned former Augustus of the West, in an attempt to restore order to the Roman Empire.

A bas-relief of a soldier and horse with saddle and stirrup s, from the tomb of Chinese Emperor Taizong of Tang ( r. 626-649 ), c. 650

Emperor Wu of Han ( r. 141 BC-87 BC ) went to war with the Dayuan for this reason, since the Dayuan were hording a massive amount of tall, strong, Central Asian bred horses in the Hellenized – Greek region of Fergana ( established slightly earlier by Alexander the Great ).

The oldest confirmed written mention of dominoes in China comes from the Former Events in Wulin ( i. e. the capital Hangzhou ) written by the Yuan Dynasty ( 1271 – 1368 ) author Zhou Mi ( 1232 – 1298 ), who listed " pupai " ( gambling plaques or dominoes ) as well as dice as items sold by peddlers during the reign of Emperor Xiaozong of Song ( r. 1162 – 1189 ).

Augustus, the first Emperor ( r. 27 BC – AD 14 ), had nominally shared power with his colleagues, and more formal offices of co-Emperor had existed from Marcus Aurelius ( r. 161 – 80 ) on.

He sought to identify himself with the warlike kings Ardashir ( r. 226 – 41 ) and Shapur ( r. 241 – 72 ), the same Shapur who had sacked Roman Antioch and skinned the Emperor Valerian ( r. 253 – 260 ) to decorate his war temple.

The first foot-sensor-activated automatic door was made in China during the reign of Emperor Yang of Sui ( r. 604 – 618 ), who had one installed for his royal library.

The Italian possession of maritime areas previously claimed by Abyssinia / Ethiopia was formalized in 1889 with the signing of the Treaty of Wuchale with Emperor Menelik II of Ethiopia ( r. 1889 – 1913 ) after the defeat of Italy by Ethiopia at the battle of Adua where Italy launched an effort to expand its possessions from Eritrea into the more fertile Abyssinian hinterland.

In naval warfare, the fleet of the Byzantine Emperor Anastasius I ( r. 491 – 518 ) is recorded by the chronicler John Malalas as having utilized a sulphur-based mixture to defeat the revolt of Vitalian in AD 515, following the advice of a philosopher from Athens called Proclus.

The Emperor Constantine Porphyrogennetos ( r. 945 – 959 ), in his book De Administrando Imperio, admonishes his son and heir, Romanos II ( r. 959 – 963 ), to never reveal the secrets of its construction, as it was " shown and revealed by an angel to the great and holy first Christian emperor Constantine " and that the angel bound him " not to prepare this fire but for Christians, and only in the imperial city ".

This also renewed the conflict with the Eastern Emperor in Constantinople, especially after Otto's son Otto II ( r. 967 – 83 ) adopted the designation imperator Romanorum.

Thus, most knowledge of Roman Britain has derived from archaeological investigations, and the epigraphic evidence lauding the Britannic achievements of an Emperor of Rome, such as Hadrian ( r. 117 – 38 ) and Antoninus Pius ( r. 138 – 61 ), whose walls demarcated the northern borders of Roman Britain.

* Frederick I, Holy Roman Emperor ( Frederick III of Swabia )( r. 1147-1152 ) King in 1152 and Holy Roman Emperor in 1155

* Frederick II, Holy Roman Emperor ( r. 1212-1216 ) King in 1212 and Holy Roman Emperor in 1220

File: Shenzong of Song. jpg | Court portrait of Emperor Shenzong of Song ( r. 1067-1085 ), Chinese

Image: Songhuizong4. jpg | Golden Pheasant and Cotton Rose, by Emperor Huizong of Song ( r. 1100-1126 AD ), Chinese

The laws ( novellae ) of the Emperor Justinian I ( r. 527 – 565 ) treat Hesychast and anchorite as synonyms, making them interchangeable terms.

Inoculation was reportedly not widely practised in China until the reign of the Longqing Emperor ( r. 1567 – 1572 ) during the Ming Dynasty ( 1368 – 1644 ), as written by Yu Tianchi in his Shadou jijie ( 痧痘集解 ) of 1727, which he alleges was based on Wang Zhangren's Douzhen jinjing lu ( 痘疹金鏡錄 ) of 1579.

Mr. McCay had on a sort of Emperor Maximilian beard and mustache.

At the beginning of the Hippodrome I saw the Kaiser's Fountain, an ugly octagonal building with a glass dome, built in 1895 by the German Emperor, and on my left, directly across from it, the tomb of Sultan Ahmet, who constructed the Blue Mosque, more properly known by his name.

It was the 7th Cavalry whose troopers were charged with guarding the Imperial Palace of the Emperor.

The majestic circular tiers of stone of the Theatre of Marcellus give you some idea of the huge edifice that the Emperor Augustus erected in 13 B.C..

This circular edifice, constructed by Agrippa in B.C. 27, was rebuilt in its present shape by the Emperor Hadrian.

The great column from which the square takes its name was erected by the Emperor Marcus Aurelius.

With the loss of the Emperor diety in Japan, the people are left in confusion with no God or moral teachings that have strength.

The existing reverence for Centrality must have been still further stimulated toward the close of the second century B.C., when the Han Emperor Wu Ti ordered the dynastic color changed to yellow -- which symbolized the Center among the traditional Five Directions -- and took 5 as the dynastic number, believing that he would thus place himself, his imperial family, and the nation under the most auspicious influences.

It was pleasant last night, therefore, to hear him do something else: a concerto he has recently recorded, `` The Emperor ''.

* Emperor Charles I. of Austria ( 1916 – 1918 ) http :// www. youtube. com / watch? v = jMU9FFzez1A

* Emperor Franz Joseph ( 1848 – 1916 ) http :// www. youtube. com / watch? v = jecUwMPk8pE & feature = related

The Emperor Romanos IV Diogenes, assuming the command in person, met the invaders in Cilicia.

In three arduous campaigns, the first two of which were conducted by the emperor himself while the third was directed by Manuel Comnenos ( great-uncle of Emperor Manuel Comnenos ), the Turks were defeated in detail in 1070 and driven across the Euphrates.

Emperor Romanos IV was himself taken prisoner and conducted into the presence of Alp Arslan, who treated him with generosity, and, terms of peace having been agreed to, dismissed him, loaded with presents and respectfully attended by a military guard.

Alp Arslan humiliating Emperor Romanos IV after the Battle of Manzikert.

* 1896 – In Athens, the opening of the first modern Olympic Games is celebrated, 1, 500 years after the original games are banned by Roman Emperor Theodosius I.

* 467 – Anthemius is elevated to Emperor of the Western Roman Empire.

* 313 – Battle of Tzirallum: Emperor Licinius defeats Maximinus II and unifies the Eastern Roman Empire.

* 392 – Arbogast has Eugenius elected Western Roman Emperor.

* 1813 – French Emperor Napoleon I defeats a larger force of Austrians, Russians, and Prussians at the Battle of Dresden.

* 1806 – Francis II, the last Holy Roman Emperor, abdicates ending the Holy Roman Empire.

* 1180 – Emperor Go-Toba of Japan ( d. 1239 )