1021 deaths

6th Fatimid caliph (r. 996–1021) and 16th Ismaili Imam

Founding leader of the Druze

Regent of the Fujiwara clan

Archbishop of Cologne

French archbishop of Reims (died 1021)

Japanese noble

Buyid ruler of Hamadan

Saint Wolbodo (c. 950 – 20 April 1021) was the bishop of Liège from 1018 to 1021.

Dattus (or Datto) was a Lombard leader from Bari, the brother-in-law of Melus of Bari. He joined his brother-in-law in a 1009 revolt against Byzantine authority in southern Italy.

Erkanbald (died 17 August 1021) was the Abbot of Fulda from 997 and afterwards Archbishop of Mainz from 1011 until his death.