1086

Year 1086 (MLXXXVI) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.

Events

By place

Europe

• Alfonso VI (the Brave) of Castile are defeated by the Moors and their allies, the Almoravids, who had been invited to help on orders by Emir Abbad III
  .
• Norman forces under Count Roger I (Bosso) conquer Syracuse, the last Muslim stronghold in Sicily.^[1]

England

• August 1 – King William I (the Conqueror) calls for a meeting at Old Sarum, where he invites his major vassals and tenants-in-chief to swear allegiance to him. The oath is known as the Oath of Salisbury.
• The Domesday Book is completed, which is drawn up on the orders of William I. It describes in detail the landholdings and resources in England.
• The population in England is estimated to be 1.25 million citizens with 10% living in boroughs.^[2]

Seljuk Empire

• Summer –
  Suleiman ibn Qutulmish, ruler of the Turks in Rum, is killed by Emir Tutush I in the battle of Ain Salm near Antioch. Suleiman's 7-year-old son Kilij Arslan is captured and transferred as hostage to Isfahan (modern Iran).^[3]
• Sultan
  Imam Ali Mosque in Najaf (modern Iraq
  ), after it was destroyed by fire.

• May 24 – Pope Victor III succeeds Gregory VII as the 158th pope of the Catholic Church, though he does not accept election until 1087.

Births

• April 24 – Ramiro II (the Monk), king of Aragon (d. 1157)
• August 11 – Henry V, Holy Roman Emperor (d. 1125)^[4]
• Poland (d. 1138
  )
• Al-Shahrastani, Persian scholar and historian (d. 1153)
• Þorlákur Runólfsson, Icelandic bishop (d. 1133)
• Vicelinus, bishop of Oldenburg in Holstein (d. 1154)
• Zhang Jun, Chinese general and official (d. 1154)

Deaths

• March 15 – Richilde, countess and regent of Flanders
• March 18 – Anselm of Lucca, Italian bishop (b. 1036)
• May 21 – Wang Anshi, Chinese chancellor (b. 1021)
• July 10 – Canute IV (the Holy), king of Denmark
• July 14 – Toirdelbach Ua Briain, Irish king (b. 1009)
• July 17 – García Ramírez, Aragonese bishop
• Luxembourg (b. 1040
  )
• September 25 – William VIII, duke of Aquitaine
• October 11 – Sima Guang, Chinese politician (b. 1019)
• October 23 – Rodrigo Muñoz, Galician nobleman
• December 25 – Judith of Bohemia, duchess of Poland
• Gregory Pakourianos, Byzantine politician and general
• Hui Zong, Chinese emperor (Western Xia) (b. 1060)
• Mael Ísu Ua Brolcháin, Irish monk and writer
• Muhammad ibn Ammar, Moorish poet (b. 1031)
• Odo I (or Eudes), French nobleman (b. 1040)
• Suleiman ibn Qutulmish, ruler of the Rum Sultanate