By 100 Trajan was back in Rome as Emperor instead of merely being a Consul.

Aelian's military treatise in fifty-three chapters on the tactics of the Greeks, titled On tactical arrays of the Greeks (), is dedicated to the Emperor Hadrian, though this is probably a mistake for Trajan, and the date 106 has been assigned to it.

The draining of the lake was revisited many times in history, including by Emperors Trajan and Hadrian, and Holy Roman Emperor Frederick II in the Middle Ages.

* 116 – Emperor Trajan sends laureatae to the Roman Senate at Rome on account of his victories and being conqueror of Parthia.

Scholars who support this theory believe that a famous letter from Pliny to Emperor Trajan concerning the delation of Christians reflects the situation faced by the addressees of this epistle.

Afer was a paternal cousin of the future Emperor Trajan.

This is a monument erected in 113 in Rome to commemorate the conquest of Dacia by Emperor Trajan ( ruled 98-117 ): its bas-reliefs are a key source for Roman military equipment.

In 104 Emperor Trajan renamed the town, which now became known as Ulpia Noviomagus Batavorum, Noviomagus for short ( the origin of the current name Nijmegen ).

Some believe he suffered martyrdom under the Roman Emperor Trajan or Hadrian, but this is improbable.

The Dacians were eventually defeated by Emperor Trajan in two campaigns stretching from 101 AD to 106 AD, and the core of their kingdom was turned into the province of Roman Dacia.

Trajan (; ; 18 September 53 – 9 August 117 ), was Roman Emperor from 98 to 117 AD.

According to the Augustan History, it was the future Emperor Hadrian who brought word to Trajan of his adoption.

* Trajan, Roman Emperor

* July 4 – Salonina Matidia, niece of Emperor Trajan ( d. 119 )

* Trajan, Roman Emperor ( 98 – 117 )

* Trajan, Roman Emperor

* Trajan is the first Roman Emperor born in Italica, near Seville.

* Emperor Trajan and Sextus Julius Frontinus become Roman Consuls.

* Emperor Trajan returns to Rome after a successful campaign against Dacia, through which he reestablishes clear Roman sovereignty over king Decebalus.

* Emperor Trajan and Manius Laberius Maximus become Roman Consul.

* Emperor Trajan starts the second expedition against Dacia, he leaves with the Imperial Roman fleet from Brundusium.

* Emperor Trajan conquers the Dacian Fortresses of the Orăştie Mountains and surrounds the capital, Sarmizegetusa.

* Emperor Trajan divides Pannonia into two portions sometime between 102 and this year.

* Emperor Trajan sends Pliny the Younger as governor ( legatus Augusti ) to Bithynia.

* September 30 – Leopold II, Holy Roman Emperor starts to rule.

* Emperor Theodosius II starts to reform the Codex Theodosianus in Constantinople.

* Emperor Antoninus Pius starts a new war against the Parthians who are led by Vologases IV.

* Emperor Wu of Han (" Martial Emperor ") starts to rule.

* Emperor Xiao Wen Di starts adopting a sinicization policy as well as various reforms.

* Emperor Xiao Wen Di of Northern Wei starts the Sinicization process by changing his clan name to the Han Chinese surname Yuan.

* Emperor Anastasius I ends a period of moderate eclectic policy, and starts strongly favoring his own monophysitist beliefs.

* Emperor Xuanzong of Tang starts to rule in Ancient China.

* Emperor Huizong of Song starts to rule in China.

* Emperor Gaozong of Tang suffers a stroke ; his wife Wu Zetian starts to rule.

* Emperor Shirakawa of Japan starts his cloistered rule.

* 14: 50 The Emperor Alexander III starts turning to the north and attempts to leave the battle line.

* c. 2697 BC: The Yellow Emperor starts to reign in China.

The history of the current municipality of Oudenaarde starts in 974, when Otto II, Holy Roman Emperor and King of Germany, built one of its three fortifications on the Scheldt at Ename to protect his kingdom against possible attacks from Francia ( the other two frontier posts were at Valenciennes and Antwerp ).

Since this rescript starts with a full quote from the Five Charter Oath of 1868 by the Meiji Emperor, the Emperor's true intention was that Japan had already been democratic in the Meiji era and was not democratized by the occupiers.

* 1591 – Joris Hoefnagel starts to work for Rudolf II, Holy Roman Emperor and produces for him 90 oil-base paints, of which one is of the Dodo.

When the Emperor ceases his greeting ( however brief ), the crowd starts waving the flags again and the Imperial Family wave back.

29, published in 1795, starts with an introductory Larghetto in 3 / 8 time, a solemn thematic declamation that is unique to the classical concerto, although the use of a slow opening would later be used by Beethoven in his Emperor Concerto.

* Francis II 1792 – 1835 correctly written " Franz "( became Emperor Francis I of Austria in 1804, at which point numbering starts anew )

It starts with the accession of Emperor Go-Toba and ends with Emperor Go-Daigo's punishment of being deported to an island of Oki Province.

It starts after Ōkagami and begins on the reign of Emperor Go-Ichijō, the 2nd year of Manju or 1025 and ends on the Emperor Takakura's reign.