* 681 – Bulgaria is founded as a Khanate on the south bank of the Danube after defeating the Byzantine armies of Emperor Constantine IV south of the Danube delta.

Schweitzer concludes that the 1st century theology, originating in the lifetimes of those who first followed Jesus, is both incompatible with, and far removed from, those beliefs later made official by the Roman Emperor Constantine in 325 CE.

By 325, the controversy had become significant enough that the Emperor Constantine called an assembly of bishops, the First Council of Nicaea, which condemned Arius ' doctrine and formulated the original Nicene Creed of 325.

Led by a pretender claiming to be Constantine Diogenes, a long-dead son of the Emperor Romanos IV, the Cumans crossed the mountains and raided into eastern Thrace until their leader was eliminated at Adrianople.

Soon afterwards he had the Empress Maria imprisoned and then killed ( forcing a signature from the child Emperor Alexius to put his mother to death ), by Pterygeonites and the hetaireiarches Constantine Tripsychos.

On the death of Emperor Constantine I, Athanasius was allowed to return to his See of Alexandria.

First exile: under Emperor Constantine, for 2. 5 years Jul 335 – 22 Nov 337 ; in Trier ( Germany ).

As a result of rises and falls in Arianism's influence after the First Council of Nicaea, Emperor Constantine I banished him from Alexandria to Trier in the Rhineland, but he was restored after the death of Constantine I by the emperor's son Constantine II.

The backstory of one of the surviving epistles, directed to Constantine I, recounts how the fame of Saint Anthony spread abroad and reached Emperor Constantine.

" Under the persistence of the brethren who told him, " Emperor Constantine loves the church ," he accepted to write him a letter blessing him, and praying for the peace and safety of the empire and the church.

The strategic significance of the strait was one of the factors in the decision of the Roman Emperor Constantine the Great to found there in AD 330 his new capital, Constantinople, which came to be known as the capital of the Eastern Roman Empire.

The location of Byzantium attracted Roman Emperor Constantine I who, in 330 AD, refounded it as an imperial residence inspired by Rome itself.

These mostly range in date from the beginning of the Greek Bronze Age ( about 3200 BC ) to the reign of the Roman Emperor Constantine I in the 4th century AD.

An Eastern Christianity | Eastern Christian Icon depicting Constantine I and Christianity | Emperor Constantine and the Fathers of the First Council of Nicaea ( 325 ) as holding the Niceno – Constantinopolitan Creed of 381.

According to the work De Administrando Imperio written by the 10th-century Byzantine Emperor Constantine VII, the Croats had arrived in what is today Croatia in the early 7th century, however that claim is disputed and competing hypotheses date the event between the 6th and the 9th centuries.

Constantinople was founded by the Roman Emperor Constantine I on the site of an already-existing city, Byzantium, settled in the early days of Greek colonial expansion, probably around 671 – 662 BC.

Emperor Constantine I presents a representation of the city of Constantinople as tribute to an enthroned Mary and Christ Child in this church mosaic.

* Constantine I, Roman Emperor from 306 to 337, commonly known as Constantine the Great

* Constantine II ( emperor ) ( 317 – 340 ), Roman Emperor 337 – 340

* Eskender ( 1471 – 1494 ), Emperor of Ethiopia sometimes known as Constantine II

In the year 1712, the Mughal Emperor Jahandar Shah, a grandson of Aurangzeb sent gifts to the Ottoman Sultan Ahmad III and refereed to himself as the Ottoman Sultan's devoted admirer.

Alexander Alexandrovich () ( 10 March 1845 – 1 November 1894 ), known historically as Alexander III or Alexander the Peacemaker reigned as Emperor of Russia from until his death on.

Alexios III Angelos () ( c. 1153 – 1211 ) was Byzantine Emperor from 1195 to 1203.

At Christmas 1196, Holy Roman Emperor Henry VI attempted to force Alexios III to pay him a tribute of 5, 000 pounds ( later negotiated down to 1, 600 pounds ) of gold or face invasion.

He had been married twice but was now allegedly the lover of Eudokia Angelina, a daughter of Emperor Alexios III Angelos.

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.

In Jerusalem he saw Theodora Komnene, the beautiful widow of King Baldwin III and niece of the Emperor Manuel.

However, during the schism between Pope Alexander III and Antipope Victor IV, Absalon stayed loyal to Valdemar even as he joined the Holy Roman Emperor Frederick Barberossa in supporting Victor IV.

* Alexius III of Trebizond, Emperor of Trebizond

* 2007 – Boris Yeltsin's funeral – the first to be sanctioned by the Russian Orthodox Church for a head of state since the funeral of Emperor Alexander III in 1894.

Albert was born in Grimma as the third and youngest son ( but fifth child in order of birth ) of Frederick II the Gentle, Elector of Saxony, and Margarete of Austria, sister of Frederick III, Holy Roman Emperor.

Emperor Joseph I, acting on behalf of his younger brother King ’ Charles III ’, absent in Spain, claimed that reconquered Brabant and Flanders should be put under immediate possession of a governor named by himself.

Baron Haussmann, a long-time prefect of Bordeaux, used Bordeaux's 18th century big-scale rebuilding as a model when he was asked by Emperor Napoleon III to transform a then still quasi-medieval Paris into a " modern " capital that would make France proud.

Other rewards were bestowed by foreign states, particularly the Ottoman Emperor Selim III, who made Nelson the first Knight Commander of the newly created Order of the Crescent, presented him with a chelengk, a diamond studded Rose, a sable fur and numerous other valuable presents.

#* Charles Louis Napoléon ( III ) Bonaparte ( 1808 – 1873 ) Emperor, married Maria Eugenia Ignacia Augustina Palafox de Guzmán Portocarrero y Kirkpatrick

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.

He is rumored to have been a relative of the Holy Roman Emperor Otto III.

On November 17, 1858, Emperor Napoleon III annexed Clipperton as part of the French colony of Tahiti.

Theodora, widow of the Emperor Theophilus ( died 842 ), acted as regent during the minority of her son Michael III, who was said to have been introduced to dissolute habits by her brother Bardas.

Hugh was crowned at Noyon on 3 July 987 with the full support from Holy Roman Emperor Otto III.

Pope Paul III then initiated several internal Church reforms while Emperor Charles V convened a meeting with Protestants in Regensburg, seat of the German diet, to reconcile differences.

Reopened at Trent on 1 May 1551 by convocation of Pope Julius III ( 1550 – 5 ), it was broken up by the sudden victory of Maurice, Elector of Saxony over the Emperor Charles V and his march into surrounding state of Tirol on 28 April 1552.

In the in-game lore of the videogame series The Elder Scrolls, there existed an eccentric emperor named Emperor Pelagius Septim III who seems to be heavily based upon Caligula.

In 1863 almost all of the group ’ s paintings were rejected by the Salon, and French Emperor Napoleon III instead decided to place their paintings in a separate exhibit hall, the Salon des Refusés.

* 1852 – Louis-Napoléon Bonaparte becomes Emperor of the French ( Napoleon III ).