Events

• The city of Oslo is founded by Harald Hardråde of Norway.
• Battle of Pasinler - Seljuks defeat a force of Byzantines and Georgians.
• Benedict IX driven from Rome, ending his third and final pontificate.
• July 17 - Damasus II appointed Pope.

Births

• May 18 - Omar Khayyám, Persian poet, astronomer, mathematician, and philosopher (d. 1123)
• May 25 - Emperor Shenzong of China (d. 1085)
• Alexius I Comnenus, Byzantine Emperor (d. 1118)

Deaths

• August 9 - Pope Damasus II
• December 13 - Al-Biruni, Persian mathematician (b. 973)

1048

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