1011

Events

By Place

Japan

• Emperor Sanjō ascends to the throne of Japan.

Egypt

• Baghdad Manifesto: Al-Hakim bi-Amr Allah's descent from Ali ibn Abi Talib is disputed.
• Ibn al-Haytham (Alhacen), a famous Iraqi scientist working in Egypt, feigns madness in fear of angering Al-Hakim, and is kept under house arrest until 1021. During this time he begins writing his influential Book of Optics.

China

• The Chinese Guangyun rime dictionary is compiled under Emperor Zhenzong of Song.

Births

• Robert I, Duke of Burgundy
• Shao Yong, Song Dynasty philosopher, cosmologist, poet and historian (d. 1077)

Deaths

• November 21 — Emperor Reizei of Japan (b. 950)
• Emperor Ichijō of Japan (b. 980)af:1011

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