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 Latin liturgy in the 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. · The Armenian Kingdom of Cilicia gains independence after its founder, Prince Ruben, succeeds in establishing his authority in the mountainous regions of Cilicia (approximate date). · The Song Dynasty Chinese polymath scientist and statesman Shen Kuo begins his defensive military campaign against the Tanguts of the Western Xia Kingdom, successfully defending the invasion route to Yan'an. Births · Leopold IV of Austria (d. 1141) · Teresa of Leon, illegitimate daughter of Alfonso VI of Cas

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