|Centuries:||10th century – 11th century – 12th century|
|Decades:||990s 1000s 1010s – 1020s – 1030s 1040s 1050s|
|Years:||1021 1022 1023 – 1024 – 1025 1026 1027|
- The Salian Dynasty of the Holy Roman Empire is founded by Conrad II.
- John XIX succeeds his brother as Pope
- Battle of Lemnos: Kievan Viking raiders (800 men) sail through the straits at Abydos to the Aegean Sea. From there they made for the island of Lemnos, but are defeated by a Byzantine fleet of the Cibyrrhaeot Theme.
- Wortley, John, ed. (2010). John Skylitzes: A Synopsis of Byzantine History, 811–1057. Cambridge: Cambridge University Press. p. 347. ISBN 978-0-521-76705-7.