May 1 Bishop Bernold flees St Pieterskerk for Utrecht, Netherlands
Sep 17 Battle of Kapetron: night battle between invading Seljuk Turks and Byzantine-Georgian forces of Constantine IX, Byzantines drive back Turks but unable to stop huge plunder
Dec 25 Parliament of Worms: Emperor Henry III names his cousin Count Bruno van Egisheim-Dagsburg as Pope Leo IX
May 18 Omar Khayyám, Persian mathematician (cubic equations), astronomer (Jalali calendar, basis of the Persian calendar), poet (quatrains), and philosopher, born in Nishapur, Khorasan (now Iran) (d. 1131)
May 25 Emperor Shenzong of China, 6th emperor of the Song dynasty in China, born in Kaifeng, China (d. 1085)
Gregory I
Gregory XIII
Julius II
Julius III
Leo X
Pius V