1080

Events 
 William I of England, in a letter, reminds the Bishop of Rome that the King of England owes him no allegiance.
 King Alfonso VI of Castile establishes the Latin liturgy in Catholic church in place of the Mozarabic rite.
 Ísleifur Gissurarson, the first bishop in Iceland, dies while giving mass in Skálholt church.
 Osmund, Bishop of Salisbury, builds Devizes Castle.
 Births 
 Edith Matilda of Scotland, Queen consort of King Henry I of England (died 1118)
 Thomas of Canterbury, Anglo-Norman nobleman (died 1159)

 Deaths 
 King Harald III of Denmark (born c.1044)
 Andronikus VI, Byzantine emperor
 Ísleifur Gissurarson, Icelandic bishop