|Covid-19|September 10 or September 18 – Battle of Kapetrou: Seljuks defeat a force of Byzantines and Georgians.
Byzantines fail to reconquer Malta.
The last Viking raid is made on the Kingdom of England; unsuccessful raiders flee to Flanders.
King Edward the Confessor of England goes to war against Flanders, blockading the English Channel with a fleet based at Sandwich, Kent.
Approximate date – The city of Oslo is founded by King Harald Hardrada of Norway.
July 16 – Pope Benedict IX is driven from Rome by German troops, ending his third and final pontificate.
July 17 – Pope Damasus II succeeds Benedict IX, as the 151st pope.
May 18 – Omar Khayyám, Persian poet, astronomer, mathematician, and philosopher (d. 1123)
May 25 – Emperor Shenzong of China (d. 1085)
Sheikh Ahmad-e Jami, Persian Sufi and Sufi writer
Alexius I Comnenus, Byzantine Emperor (d. 1118)
Arwa al-Sulayhi, sovereign queen of Yemen (d. 1138)
August 9 – Pope Damasus II
December 13 – Al-Biruni, Persian mathematician (b. 973)
Year 1048 (MXLVIII) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar.
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