1023

Events 

 By place 
 Europe 
 The Judge-Governor of Seville takes advantage of the break up of the Caliphate of Córdoba, and takes power as Abbad I, founding the Abbadid dynasty.
 Abd ar-Rahman V becomes Caliph at Córdoba.

 Asia 
 The Ghaznavid Empire occupies Transoxiana.

 Africa 
 Soon after returning from Mecca, the Tarsina king of Zanata, a mountain kingdom between Algeria and Morocco, is killed in battle.

 Births 
 William VII, Duke of Aquitaine (d. 1058)

 Deaths 
 Wulfstan II, Archbishop of York
 Oda of Haldensleben, wife of Mieszko I of Poland
 Llywelyn ap Seisyll, King of Gwynedd
 Sitt al-Mulk, regent of the Fatimid Caliphate (1021 to 1023) for ʻAlī az-Zāhir, the Seventh Caliph (1021 to 1036)