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The 900s

298 sourced entries across 10 years, inside the 10th century. Each year below opens its own page; the lines under it are that year’s highest-ranked entries.

900 CE51 entries

  • June 8 – Edward the Elder (son of Alfred the Great) is crowned king of England at Kingston upon Thames.
  • August 13 – Zwentibold, king of Lotharingia, is killed in battle on the Meuse River, while fighting against his rebellious subjects; subsequently they recognize Louis IV as their rightful suzerain - Lotharingia is then converted from a kingdom to a duchy.
  • October 12 – Following Magyars raids in Lombardy, king Louis III ("the Blind") is called to Italy by the grandees. He takes Pavia, forcing king Berengar I to flee, and replaces him as King of Italy.

901 CE33 entries

  • January 25 – Sugawara no Michizane, a Japanese poet, is demoted from his aristocratic rank and is exiled to a minor official post at Dazaifu (Chikuzen Province).
  • January – Arethas of Caesarea speaks on the occasion of the Epiphany. He becomes the official rhetor at the Byzantine court of Emperor Leo VI (the Wise) at Constantinople, and is nominated as Archbishop of Caesarea in Cappadocia.
  • February 18 – Thābit ibn Qurra dies at Baghdad, having served as court astronomer to the Abbasid Caliph Al-Mutadid. He has spent his life translating and teaching the works of Greek mathematicians, and of his own.

902 CE34 entries

  • August 1 – Taormina, the last Byzantine stronghold in Sicily, is captured by the Aghlabid army. After nearly 75 years, all of Sicily is in Aghlabid hands.
  • September – Ibrahim II crosses the Strait of Messina into Calabria. He begins his march to conquer the rest of Italy, and lays siege at Cosenza.
  • December 13 – Battle of the Holme: The Anglo-Saxon army is defeated by the Danish Vikings under Æthelwold (a son of Æthelred I) at Holme. Æthelwold is killed, ending his revolt against King Edward the Elder.

903 CE23 entries

  • July – Pope Benedict IV dies after a 3-year reign. He is succeeded by Leo V as the 118th pope of the Catholic Church. Leo is imprisoned and tortured by Antipope Christopher after a reign of just 1 month. Christopher makes himself the new pope of Rome.
  • November 29 – Battle of Hama: Abbasid forces under Muhammad ibn Sulayman al-Katib defeat the Qarmatians near Hama, on the banks of the Orontes River (modern Syria). The Qarmatian army is scattered and pursued by Abbasid troops; Al-Husayn ibn Zikrawayh and other Qarmatian leaders are captured.
  • King Berengar I of Italy proceeds to issue concessions and privileges to the Lombard nobility and monasteries. He grants concessions to Bobbio Abbey in Emilia-Romagna (Northeast Italy).

904 CE29 entries

  • January 29 – Pope Sergius III succeeds Leo V and the deposed Antipope Christopher (both of whom are murdered or exiled) as the 119th pope of the Catholic Church. The ascension of Sergius marks the beginning of the Pornocracy ('rule of the whores'), which will last for 150 years. During this time, the clergy will be sidelined and rule over Rome is dominated by the Roman nobility.
  • July 29 – Sack of Thessalonica: A Muslim fleet, led by the Greek renegade Leo of Tripoli, appears outside Thessalonica and begins its attack after a short and silent inspection of the fortification of the city. After attacks from the sea for two days, the Saracens are able to storm the city walls, overcome the Thessalonians' resistance and capture the city. The sacking continues for a full week, before the raiders depart for their base in the Levant. Having freed 4,000 Muslim prisoners and captured 60 ships, gaining a large loot, they carry off 22,000 men and women as slaves.
  • September 22 – The warlord Zhu Quanzhong kills Emperor Zhao Zong, along with his family and many ministers, after seizing control of the imperial government. Zhu places Zhao Zong's 13-year-old son Ai (Li Zhou) on the imperial throne as a puppet ruler of the Tang dynasty.

905 CE27 entries

  • Naum of Preslav, a Bulgarian missionary, founds a monastery on the shores of Lake Ohrid (modern-day North Macedonia), which later receives his name.
  • China loses control over Annam (Northern Vietnam). The village notable Khuc Thua Du leads a rebellion against the Tang Dynasty. The Chinese garrison at Tong Binh (modern Hanoi) is destroyed. Khuc Thua Du declares Annam autonomous.
  • Norse settlers under the Viking warlord Ingimundr, revolt against the Mercians and try to capture the city of Chester. They are beaten off.

906 CE21 entries

  • January 22 – The warlord Zhu Quanzhong secretly puts Empress Dowager He, the wife of the late Emperor Zhaozong and mother of the reigning Emperor Ai, to death (by strangulation) and has her defamed and posthumously demoted to commoner rank.
  • February 27 – Battle of Fritzlar: The Conradines defeat the Babenberg counts, to establish themselves as dukes of Franconia (modern-day Bavaria). Count Conrad the Elder is killed in the battle; his son Conrad the Younger becomes duke of Franconia.
  • October 22 – Abbasid commander Ahmad ibn Kayghalagh leads a raid against the Byzantine Empire from Tarsus, joined by the governor Rustam ibn Baradu. He reaches the Halys River and takes 4,000–5,000 captives.

907 CE25 entries

  • June 8 – The Chu Kingdom is founded by the warlord Ma Yin (Prince of Chu) in Changsha. Present-day Hunan and Guangxi provinces (Southern China) are under his control.
  • July 4–6 – Battle of Pressburg: At "Brezalauspurc" (probably modern-day Bratislava in Slovakia), the advancing East Frankish army (60,000 men) is annihilated by the Hungarians led by Grand Prince Árpád. Duke Luitpold and Archbishop Dietmar I are killed, together with 19 dukes, 2 bishops and 3 abbots. The East Frankish Kingdom loses control of the March of Pannonia.
  • November 3 – The Former Shu Kingdom is founded by the warlord Wang Jian (Prince of Shu) in Chengdu. His power is centered in Sichuan province, in Southwest China.

908 CE29 entries

  • March 26 – Emperor Taizu (Zhu Wen) of Later Liang has the 15-year-old Li Zhu, the last Tang Dynasty emperor, poisoned. Li Zhu receives the posthumous name of Ai ("lamentable").
  • June 9 – The generals Zhang Hao and Xu Wen assassinate Yang Wo (Prince of Hongnong). He is succeeded by his 11-year-old brother Yang Longyan as ruler of the Wu Kingdom.
  • August 13 – Abbasid caliph al-Muktafi died and he was succeeded by his nominated heir, his younger brother Jafar (Al-Muqtadir).

909 CE26 entries

  • March 18 – The Fatimid Dynasty founded by Shiite Muslims in Ifriqiya (modern Tunisia) gains suzerainty over the Aghlabid Dynasty in North Africa. Emir Ziyadat Allah III escapes to the Near East, unable to secure any help from the Abbasid Caliphate to regain his emirate.
  • April 27 – The Min Kingdom (modern-day Fujian province) is established by governor Wang Shenzhi (Prince of Langye), with Fuzhou (known as Changle) as its capital. Wang Shenzhi tries to attract scholars who will help to construct an efficient bureaucracy and tax system.
  • The last Long Count date is inscribed on a monument at the Mayan site of Toniná (modern-day Chiapas, Mexico), marking the end of the Classic Maya Period.