* 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.

* 527 – Byzantine Emperor Justin I names his nephew Justinian I as co-ruler and successor to the throne.

* 1091 – Battle of Levounion: The Pechenegs are defeated by Byzantine Emperor Alexius I.

* 1018 – Byzantine general Eustathios Daphnomeles blinds and captures Ibatzes of Bulgaria by a ruse, thereby ending Bulgarian resistance against Emperor Basil II's conquest of Bulgaria.

* Alexander, Byzantine Emperor ( 912 – 913 )

* Alexander ( emperor ), Byzantine Emperor ( 912 – 913 )

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.

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

Alexios V Doukas, surnamed Mourtzouphlos (, d. December 1205, Constantinople ) was Byzantine Emperor ( 5 February – 12 April 1204 ) during the second and final siege of Constantinople by the participants of the Fourth Crusade.

He was the last Byzantine Emperor to reign in Constantinople before the establishment of the Latin Empire, which controlled the city for the next 57 years, until it was recovered by the Nicaean Emperor Michael VIII Palaiologos.

* Anastasius I ( emperor ) ( 430 – 518 ), Roman ( Byzantine ) Emperor from 491 to 518

In spite of several not insignificant reverses at the hands of Bulgarians, Serbians, and Ottomans, the Emperor had provided the Empire with active leadership, had cooperated with able administrators, and had come closer than any of his predecessors in re-establishing Byzantine control over the Greek peninsula.

Andronikos I Komnenos ( or Andronicus I Comnenus, ; c. 1118 – September 12, 1185 ) was Byzantine Emperor from 1183 to 1185 ).

However, as Andronikos ' rule went on, the Emperor became increasingly paranoid and violent – in September 1185, Andronikos ordered the execution of all prisoners, exiles and their families for collusion with the invaders – and the Byzantine Empire descended into a terror state.

* 475 – Byzantine Emperor Basiliscus issues a circular letter ( Enkyklikon ) to the bishops of his empire, supporting the Monophysite christological position.

Arcadius (; ; 377 / 378 – 1 May 408 ) was the Byzantine Emperor from 395 until his death in 408.

This could be either the normal military dress, with a tunic to about the knees, armour breastplate and pteruges, but also often the specific dress of the bodyguard of the Byzantine Emperor, with a long tunic and the loros, a long gold and jewelled pallium restricted to the Imperial family and their closest guards.

* 491 – Flavius Anastasius becomes Byzantine Emperor, with the name of Anastasius I.

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.

In the sixth century, the Byzantine Emperor Justinian oversaw the consolidation of Roman civil law.

At the Istanbul Archaeological Museum a marble plate contains a law by the Byzantine Emperor Anastasius I ( 491-518 AD ), that regulated fees for passage through the customs office of the Dardanelles ( see image to the right ).

* 1025 – Basil II, Byzantine Emperor ( b. 958 )

* 627 – Battle of Nineveh: A Byzantine army under Emperor Heraclius defeats Emperor Khosrau II's Persian forces, commanded by General Rhahzadh.

Andronikos III Palaiologos, Latinized as Andronicus III Palaeologus (; 25 March 1297 – 15 June 1341 ) was Byzantine emperor from 1328 to 1341, after being rival emperor since 1321.

Andronikos II Palaiologos () ( 25 March 1259 – 13 February 1332 ), Latinized as Andronicus II Palaeologus, was Byzantine emperor from 1282 to 1328.

He and his ally, Byzantine emperor John V Palaeologus ' son Andronicus, rebelled against their fathers.

After the Byzantine defeat of the Battle of Pelekanon, Orhan developed friendly relations with Andronicus III Palaeologus, and maintained them with some of his successors.

* 1185 – Isaac II Angelus kills Stephanus Hagiochristophorites and then appeals to the people, resulting in the revolt that deposes Andronicus I Comnenus and places Isaac on the throne of the Byzantine Empire.

* Andronicus I Comnenus, Byzantine Emperor ( d. 1185 )

* Andronicus Comnenus is imprisoned for conspiring against Byzantine emperor Manuel I Comnenus.

* Byzantine Emperor Andronicus I escapes from prison.

* August 12 – With the help of the Genoese, Byzantine co-emperor Andronicus IV Palaeologus invades Constantinople and dethrones his father, John V Palaeologus, as co-emperor.

* Andronicus I Comnenus becomes Byzantine Emperor.

His literary activity was considerable, his most important work being a Byzantine history in thirteen books, in continuation of that of George Acropolites from 1261 ( or rather 1255 ) to 1308, containing the history of the reigns of Michael and Andronicus II Palaeologus.

In 1179, the Byzantine emperor Manuel I Comnenus offered his daughter Maria the Porphyrogenita as a bride to one of the sons of William V. Since Boniface, like his older brother Conrad, was already married, and Frederick was a priest, the youngest brother, Renier, married her instead, only to be murdered along with her during the usurpation of Andronicus.

Andronikos IV Palaiologos ( or Andronicus IV Palaeologus ) ( Greek: Ανδρόνικος Δ ' Παλαιολόγος, Andronikos IV Paleologos ) ( 2 April 1348 – 28 June 1385 ) was Byzantine Emperor from 1376 to 1379.

In 1303 de Flor offered the services of his Company to the Byzantine emperor Andronicus II Palaeologus and his son the Basileus Michael IX Palaeologus.

# Rita ( b. 11 January 1278 / 10 January 1279 – July 1333 ), renamed Maria upon her wedding ; married in 1294 with Michael IX Palaeologus, co-Emperor of the Byzantine Empire with his father Andronicus II Palaeologus.

The Byzantine governor of Tarsus, Andronicus Euphorbenus, invited him to a banquet and murdered him on February 7, 1165.

Thoros ’ s brother, Stephen, ignoring Thoros ’ s official pledges to Manuel, with the help of a few of his supporters continued attacking Greek garrisons thus giving Andronicus Euphorbenus, the Byzantine governor stationed in Tarsus, the opportunity to sabotage the treaty.

Eventually, reconciliation with the emperor was negotiated through the mediation of King Amalric I of Jerusalem: Andronicus Euphorbenus was recalled and replaced by Konstantinos Kalamanos as the new Byzantine governor in Tarsus.

Leo ’ s father, who was on his way to attend a banquet given by the Byzantine governor of Cilicia, Andronicus Euphorbenus, was murdered on 7 February 1165.

Roupen ’ s father, who was on his way to attend a banquet given by the Byzantine governor of Cilicia, Andronicus Euphorbenus, was murdered on February 7, 1165.

At the end of 1182, the Byzantine governor of Cilicia, Isaac Comnenus, in revolt against the Emperor Andronicus I Comnenus, sought help from Bohemond III against Roupen and admitted his troops into Tarsus.

Humphrey himself later married Philippa, sister of Bohemund III of Antioch, who had previously had an affair with future Byzantine emperor Andronicus I Comnenus, Manuel's cousin.

Emperor Andronikos III ( Andronicus III ) purportedly gave his illegitimate daughter in marriage to Öz Beg but relations turned sour at the end of Andonicus's reign, and the Mongols mounted raids on Thrace between 1320 to 1324 until the Byzantine port of Vicina Macaria was occupied by the Mongols.