1048

Events

* The city of Oslo is founded by Harald Hardråde of Norway.
* July 16 — Pope Benedict IX is driven from Rome, ending his third and final pontificate.
* July 17 — Pope Damasus II succeeds Pope Benedict IX as the 151st pope.
* September 10 or 18 - Battle of Kapetrou: Seljuks defeat a force of Byzantines and Georgians.

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)
* June 16 — Sheikh Ahmad-e Jami, Persian Sufi and Sufie writer

Deaths

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