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The 860s

289 sourced entries across 10 years, inside the 9th century. Each year below opens its own page; the lines under it are that year’s highest-ranked entries.

860 CE33 entries

  • June 18 – Byzantine–Rus' War: A fleet of about 200 Rus' vessels sails into the Bosphorus, and starts pillaging the suburbs of Constantinople. The raiders set homes on fire, and drown and kill the citizens. Unable to do anything to repel the invaders, Patriarch Photios I urges his flock to implore the Theotokos to save the Byzantine capital. Having devastated the suburbs, the Rus' Vikings pass into the Sea of Marmara and attack the Isles of the Princes, plundering the local monasteries.
  • December 20 – King Æthelbald of Wessex dies after a 2½-year reign. He is succeeded by his brother, sub-king Æthelberht of Kent, who becomes sole ruler of Wessex.
  • Lusterware tiles, that decorated the mihrab of the Mosque of Uqba at Kairouan (modern Tunisia), are made (approximate date).

861 CE24 entries

  • December 11 – Caliph al-Mutawakkil is assassinated by his Turkish guard, starting the period of troubles known as the "Anarchy at Samarra" (861–870). He is succeeded by his son Al-Muntasir, as ruler of the Abbasid Caliphate.
  • Al-Mutawakkil (r. 847–861) orders the construction of a Nilometer on Rhoda Island in central Cairo, supervised by the Persian astronomer Ahmad ibn Muhammad ibn Kathir al-Farghani.
  • Ya'qub ibn al-Layth, a Muslim military leader, starts rebelling against the Abbasids and founds the Saffarid Dynasty in the 870s. He rules over parts of Khurasan and eastern Iran, and establishes his capital at Zaranj (modern Afghanistan).

862 CE33 entries

  • March – Viking raiders led by Weland are trapped at Trilbardou Bridge (Northern France), and submit to King Charles the Bald. He and his family accept Christianity (they are baptised) before leaving Neustria.
  • April 13 – King Donald I of Scotland dies after a 4-year reign. He is succeeded by his nephew Constantine I, as ruler of Scotland.
  • June – Caliph al-Muntasir dies after just a half-year reign. He is succeeded by al-Musta'in (son of prince Muhammad), as ruler of the Abbasid Caliphate.

863 CE32 entries

  • 13 February – Dvin earthquake. It took place in the city of Dvin on 13 February, 863. During the 9th century, Dvin was the only "heavily populated" city in Muslim-dominated Armenia. The city was part of the wider Abbasid Caliphate, and had a multiethnic population.
  • September 3 – Battle of Lalakaon: A Byzantine army confronts an invasion by Muslim forces, led by Umar al-Aqta, Emir of Malatya. The Muslims raid deep into Byzantine territory, reaching the Black Sea coast at the port city of Amisos. Petronas annihilates the Arabs near the River Lalakaon, in Paphlagonia (modern Turkey).
  • Duan Chengshi, Chinese author and scholar, writes about the Chinese maritime trade and the Arab-run slave trade in East Africa.

864 CE30 entries

  • July 25 – Edict of Pistres: King Charles the Bald orders defensive measures against the Vikings. He creates a large force of cavalry, which inspires the beginning of French chivalry.
  • September 13 – Pietro Tradonico dies after a 28-year reign. He is succeeded by Orso I Participazio, who becomes doge of Venice.
  • King Alfonso III conquers Porto from the Emirate of Cordoba. This is the end of the direct Muslim domination of the Douro region.

865 CE26 entries

  • Autumn – King Æthelberht of Wessex dies after a 5-year reign, and is buried at Sherborne Abbey (Dorset). He is succeeded by his brother Æthelred I, as ruler of Wessex.
  • Kassia, a Byzantine abbess and hymnographer, dies. She is one of the first Early Medieval composers of many hymns.
  • Viking king Ragnar Lodbrok is captured by the Northumbrians in battle, and killed by being thrown into a pit filled with venomous snakes, on the orders of King Ælla of Northumbria.

866 CE31 entries

  • April 21 – Bardas, the regent of the Byzantine Empire, is murdered by Basil the Macedonian at Miletus, while conducting a large-scale expedition against the Saracen stronghold of Crete.
  • May 26 – Basil the Macedonian is crowned co-emperor of the Byzantine Empire, and is adopted by the much younger Michael III.
  • October 17 – Caliph al-Musta'in is put to death, after a 4-year reign. He is succeeded by al-Mu'tazz, who becomes the youngest Abbasid caliph to assume power.

867 CE29 entries

  • September 24 – Emperor Michael III is murdered, by order of his co-emperor Basil I. Basil becomes sole ruler (basileus) of the Byzantine Empire, and founds the Macedonian Dynasty (until 1056). Basil rebuilds the Byzantine army and navy, in an effort to restore the empire.
  • September – Photius I ("the Great"), patriarch of Constantinople, is removed from office and banished. Ignatius is reinstated as patriarch by Basil I.
  • The Council of Constantinople is held (presided over by Patriarch Photius), which anathematizes the use of the Filioque clause in the Creed, and also Pope Nicholas I, for his attacks on the work of Greek missionaries in Bulgaria.

868 CE23 entries

  • May 11 – The earliest extant printed book, an illustrated scroll of the Diamond Sutra ("Perfection of Wisdom"), unearthed at Dunhuang (Western China), is produced.
  • September 15 – Ahmad ibn Tulun, a Turkish general, is sent to Egypt as governor, by the Abbasid caliph Al-Mu'tazz. He becomes the founder of the Tulunid Dynasty (until 905), and Egypt becomes an autonomous state for the first time since the Ptolemaic Kingdom.
  • Ratramnus, a Frankish monk and abbot of Corbie Abbey, writes Contra Graecorum Opposita.

869 CE28 entries

  • July 9 – The 869 Sanriku earthquake and associated tsunami devastate a large part of the Sanriku coast on the northeastern side of the island of Honshu.
  • October 5 – The Fourth Council of Constantinople, called by Basil I and Pope Adrian II, opens. The council will condemn Photius I and depose him as patriarch, reinstating his predecessor Ignatios.
  • The Hagia Sophia Basilica (church) in Constantinople suffers great damage during an earthquake, which makes the eastern half-dome collapse. Basil I orders it to be repaired.