Eastern Hemisphere in 565AD. A millennium (pl millennia) is a period of Time equal to one thousand Years (from Latin la mille, thousand and la annum The first millennium is a period of time that commenced on January 1, 1, and ended on December 31, 1000, of the Julian calendar. A century (from the Latin centum, meaning one hundred is One hundred consecutive Years Centuries are numbered ordinally (e The 5th century is the period from 401 to 500 in accordance with the Julian calendar in Anno Domini / Common Era. The 6th century is the period from 501 to 600 in accordance with the Julian calendar in the Christian / Common Era. The 7th century is the period from 601 to 700 in accordance with the Julian calendar in the Christian / Common Era. See also List of centuries, History This is a list of Decades in history including links to corresponding articles with more information about them Events and Trends 532 — Nika riots in Constantinople; the cathedral was destroyed Events and Trends The Eastern Roman Empire conquers Milan and the Ostrogothic capital of Ravenna in 540. Events and Trends 554, Eviction of the Ostrogoths from Rome and the re-unification of all Italy under Imperial rule Events and Trends Birth of Muhammad, prophet of Islam 577 Battle of Deorham between the Saxons and the Britons in South West Events and Trends The Sui Dynasty unites China for the first time since the fall of the Western Jin Dynasty in 311. Events and Trends 590, Pope Gregory I succeeds Pope Pelagius II as the 64th pope Events By Place Europe Ceawlin of Wessex becomes King of Wessex (traditional date Events By Place Europe Clotaire I dies and the Frankish kingdom is divided Sigebert I becomes king of Austrasia Events By Place Byzantine Empire Belisarius stands trial for corruption in Constantinople, possibly with Events By Place Byzantine Empire Justinian I re-consecrates Hagia Sophia after its dome is rebuilt Events Births Hermenegild, Spanish Visigoth prince Li Baiyao, Chinese government official and historian who completed Events By Place Byzantine Empire November 14 — Justin II succeeds Justinian I as Emperor Events Births Abbas ibn Abd al-Muttalib, uncle of Muhammad Emperor Gaozu of Tang Events By Place Europe Liuva I succeeds Athanagild as king of the Visigoths. Events By Place Europe April 1 — King Alboin leads the Lombards into Italy refugees fleeing from them go on Events By Place Byzantine Empire The King of the Garamantes signs a peace treaty with Byzantium.