Effective administrative authority during the reign of Andronikos III was wielded by his megas domestikos John Kantakouzenos, while the Emperor enjoyed himself hunting or waging war.

Eudoxia's influence was strongly opposed by John Chrysostom, the Patriarch of Constantinople, who felt that she had used her family's wealth to gain control over the Emperor.

When Frederick IV of Habsburg sided with Antipope John XXIII at the Council of Constance, Emperor Sigismund placed him under the Imperial ban.

He thus broke allegiance with Philip and assembled a broad coalition including Emperor Otto IV, King John I of England, Duke Henry I of Brabant, Count William I of Holland, Duke Theobald I of Lorraine, and Duke Henry III of Limburg.

The campaign was designed by John, who was the fulcrum of the alliances ; his plan being to draw the French away from Paris southward against himself and keep him occupied, while the main army, under Emperor Otto IV, marched on Paris from the north.

* 915 – Pope John X crowned Berengar I of Italy as Roman Emperor.

* 969 – Byzatine Emperor Nikephoros II is assassinated by his wife Theofano and her lover, the later Emperor John I Tzimiskes.

Terror Firma seemed to contradict the events of the Eighth Doctor Adventures novel War of the Daleks by John Peel, in which an unmerged Davros is placed on trial by the Dalek Prime, a combination of the Dalek Emperor and the Dalek Supreme.

The Favorites of the Emperor Honorius, by John William Waterhouse, 1883.

* 881 – Pope John VIII crowns Charles the Fat, the King of Italy: Emperor

* 962 – Translatio imperii: Pope John XII crowns Otto I, Holy Roman Emperor, the first Holy Roman Emperor in nearly 40 years.

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.

But in 1351 at a synod under the presidency of the Emperor John VI Cantacuzenus, Hesychast doctrine was established as the doctrine of the Orthodox Church.

* 976 – John I Tzimiskes, Greek Byzantine Emperor ( b. 925 )

By 1212 John had successfully concluded alliances with Renault of Dammartin, who controlled Boulogne, and Count Ferdinand of Flanders, as well as Otto IV, a contender for the crown of Holy Roman Emperor in Germany ; Otto was also John's nephew.

Two of John ’ s close allies, Emperor Otto and Count Raymond VI of Toulouse, had already suffered the same punishment themselves, and the significance of excommunication had been somewhat devalued.

John was optimistic, as he had successfully built up alliances with the Emperor Otto, Renaud of Boulogne and Count Ferdinand of Flanders ; he was enjoying papal favour ; and he had successfully built up substantial funds to pay for the deployment of his experienced army.

The Tridentine Calendar also had on 6 May a feast of " St John before the Latin Gate ", associated with a tradition recounted by Saint Jerome that St John was brought to Rome during the reign of the Emperor Domitian, and was thrown in a vat of boiling oil, from which he was miraculously preserved unharmed.

After the death of both Fulk and Emperor John in separate hunting accidents in 1143, Zengi invaded and conquered Edessa in 1144.

Al-Kamil retreated to the nearby fortress of al-Mansurah, but the crusaders remained in Damietta throughout 1219 and 1220, awaiting the arrival of Holy Roman Emperor Frederick II, while King John returned to Acre briefly to defend against al-Mu ' azzam, who was raiding the kingdom from Damascus in John's absence.

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

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

Constantine's son Constantius II, who had become Emperor of the eastern part of the Empire, actually encouraged the Arians and set out to reverse the Nicene creed.

In 355 Constantius became the sole Emperor and extended his pro-Arian policy toward the western provinces, frequently using force to push through his creed, even exiling Pope Liberius and installing Antipope Felix II.

* 1203 – Isaac II Angelos, restored Eastern Roman Emperor, declares his son Alexios IV Angelos co-emperor after pressure from the forces of the Fourth Crusade.

* 435 – Deposed Ecumenical Patriarch of Constantinople Nestorius, considered the originator of Nestorianism, is exiled by Roman Emperor Theodosius II to a monastery in Egypt.

Although the western Emperor Gratian held orthodox belief in the Nicene creed, the younger Valentinian II, who became his colleague in the Empire, adhered to the Arian creed.

* 1945 – Japan accepts the Allied terms of surrender in World War II and the Emperor records the Imperial Rescript on Surrender ( August 15 in Japan Standard Time ).

* 982 – Holy Roman Emperor Otto II is defeated by the Saracens in the battle of Capo Colonna, in Calabria

* 268, Battle of Lake Benacus — Romans under Emperor Claudius II defeat the Alemanni.

He then followed the fortunes of his friend Elector Maurice of Saxony, deserted Charles, and joined the league which proposed to overthrow the Emperor by an alliance with King Henry II of France.

Alexander Alexandrovich Romanov was born on 10 March 1845 in Saint Petersburg, Russia, the second son of Emperor Alexander II of Russia and his wife Maria Alexandrovna ( Marie of Hesse ).

* Alexander II of Russia ( 1818 – 1881 ), Emperor of Russia

Alexios II Komnenos or Alexius II Comnenus () ( 10 September 1169 – 24 September 1183, Constantinople ), Byzantine emperor ( 1180 – 1183 ), was the son of Emperor Manuel I Komnenos and Maria, daughter of Raymond, prince of Antioch.

* 357 – Emperor Constantius II enters Rome for the first time to celebrate his victory over Magnus Magnentius.

On the way home, he negotiated with King Levon I of Armenia, the Emperor Theodore I Laskaris of Nicaea and Tsar Ivan Asen II of Bulgaria and arranged several marriage contracts between his children and the courts he visited.

Andrew's first mission to the East was when he was asked by the French king Louis IX to go and fetch the Crown of Thorns which had been sold to him by the Latin Emperor of Constantinople Baldwin II in 1238, who was anxious to obtain support for his tottering empire.

In 1180 the Emperor Manuel died and was succeeded by his ten year old son Alexios II, who was under the guardianship of his mother, Empress Maria.

A bust of Emperor Constantius II from Syria. Ammianus was born between 325 and 330 in the Greek-speaking East, possibly at Antioch on the Orontes.

* Alexius II of Trebizond, Emperor of Trebizond

Eudoxia gave to Arcadius four children: three daughters, Pulcheria, Arcadia and Marina, and one son, Theodosius, the future Emperor Theodosius II.

* 355 – Claudius Silvanus, accused of treason, proclaims himself Roman Emperor against Constantius II.

* 1804 – Francis II assumes the title of first Emperor of Austria.

Antipope Felix II was installed as Pope in 355 after the Emperor Constantius II banished the reigning Pope, Liberius, for refusing to subscribe the sentence of condemnation against Saint Athanasius.