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Period: 300 to 400
Time period generally regarded as the beginning of the Byzantine Empire
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Period: 324 to 337
Constantine I's reign as Monokrator
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325
Council of Nicaea
First council of the Catholic church declares Arius and Arianism to be heretical. -
330
Constantine I moves the Roman capital to Byzantium; renames it to New Rome
Byzantium was an ancient Greek city. It later became known as Constantinople -
Period: 474 to
Emperor Zeno's Rule
During his reign, he dealt with an attempted coup, the Vandals, the takeover of the Western Roman Empire at the hands of Odoacer, the Monophysite-Orthodox conflict, and the Ostrogoths under King Theodoric the Great. -
Period: 527 to 565
Justinian I's Reign
Ruled the Byzantine Empire at its peak, conquered the former Western Roman Empire, rebuilt Constantinople following a major and destructive rebellion, and codified law. Additionally, he built the Hagia Sophia.
After his death, less competent rulers replaced him, sending the Byzantine Empire into a long period of decline. -
532
Nika Revolt
Two leaders of opposing factions are arrested, sparking a major revolt in Constantinople. Justinian I is nearly driven out, but his wife, Theodora, convinced him to stay. Large portions of the city were damaged or destroyed. -
Period: Mar 22, 610 to
Heraclius I's Reign
Heraclius I seizes power of the Empire through a coup, reforming the government and allowing some level of decentralization.
During this time period, the Persians, Avars, and Arabs conquered large portions of the empire. -
Mar 22, 641
Heraclius I dies of tuberculosis
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Period: Mar 22, 1068 to Mar 22, 1071
Romanus IV Diogenes Reigns
The Empire loses large portions of Asia Minor to the Seljuk Turks at the Battle of Manzikert in 1071 while the Normans take Bari, the last Byzantine holding ont the Italian Peninsula. These losses were compounded by the Battle of Myriocephalum between the Turks and the Byzantines, who lost half of their army as the result of poor discipline and communication. -
Mar 22, 1081
The Seljuk Turks take over Nicaea; establish the Sultanate of Rum
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Mar 22, 1082
Commercial privileges granted to Venice in exchange for military support against the Normans.
*Venitians don't have to pay any taxes. Despite the aid, the Normans take control of the Mediterranean trade routes, limiting the Byzantine Empire's resources. -
Mar 22, 1095
Alexius I Comnenus appeals to Pope Urban II for military aid against the Turks, sparking the First Crusade
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Period: Mar 22, 1096 to Mar 22, 1099
First Crusade against the Turks occurs
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Mar 22, 1097
Nicaea is retaken by the Byzantine Empire
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Mar 22, 1159
Emperor Manuel I Comnenus of the Byzantines retakes Antioch from the Normans
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Period: Mar 22, 1202 to Mar 22, 1204
The Fourth Crusade
Although intended to conquer the Muslim-controlled Holy Lands, the crusaders quickly turned on the Byzantines after they failed to make payments to the Venitians. Alexus IV attempted to reestablish his father Isaac II Angelus's rule in exchange for money. -
Period: Mar 22, 1300 to Mar 22, 1350
Early 1300s: Byzantine loses significant territory
*Bithynia is lost in northwestern Asia Minor
*Portions of Greece are taken by the Serbs, a former part of the Byzantine Empire that broke off previously
*In all, half of the Byzantine Empire is eventually controlled by the Serbs. -
Period: Mar 22, 1341 to Mar 22, 1354
Civil War and Coups
A large-scale civil war and a series of coups weaken the Empire, despite it being surrounded by enemies. -
Period: Mar 22, 1354 to Mar 22, 1390
The Turkish Ottoman Empire conquers all of the Byzantine landholdings in Asia Minor
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Mar 22, 1396
The Crusade of Nocopolis attempts to drive out the Turks, fails
It was a joint Balkan-Western-European effort, but it failed. -
Mar 22, 1402
The Ottomans are defeated by the Mongols at the Battle of Ankara
This provided a brief respite from the Empire's constant losses, allowing its survival for another 51 years. -
Period: Mar 22, 1438 to Mar 22, 1439
Council of Ferrara-Florence attempts to repair relations between the Orthodox and Latin Catholic Churches
This fails, further dividing the Byzantine Empire while also cutting it off from potential allies. -
Mar 22, 1443
Pope Eugenius IV organizes a massive crusade against the Turks
250,000 Hungarians, Serbs, and Vlachs (Latin people in central and eastern Europe) were involved -
Nov 22, 1444
The crusaders attempt to retake Varna, but fail
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Mar 22, 1448
Constantine XI Palaeologus takes the throne
He is the last emperor before its collapse at the hands of the Ottomans. -
May 29, 1453
Constantinople is taken by the Turkish Empire
Due to a lack of rapid reinforcements, and a lack of reinforcments overall, the Byzantine Empire is able to be taken by the Ottomans, ending the Roman reign in Europe. -
Roman Emperor Theodosius I dies, the Roman Empire splits
The Roman Empire splits into the East and West Roman Empire -
Heraclius I publishes the Exposition of Faith
It was published in attempt to merge the Monophysite beliefs of the Syrians with the Orthodox Church. This failed when the pope rejected the change to the doctrine and the Arabs conquered Syria. As a result of the publishing of this document, Heraclius lost the support of the church while gaining nothing.