Casimir I the Restorer

Casimir I the Restorer
Duke of Poland
Reign1040–1058
PredecessorBolesław the Forgotten
SuccessorBolesław II the Bold
Born25 July 1016
Kraków, Poland
Died19 March 1058 (aged 41)
Poznań, Poland
Burial
Wife
Issue
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DynastyPiast dynasty
FatherMieszko II Lambert
MotherRicheza of Lotharingia

Casimir I the Restorer (Polish: Kazimierz I Odnowiciel; 25 July 1016 – 19 March 1058), a member of the Piast dynasty, was the duke of Poland from 1040 until his death. Casimir was the son of Mieszko II Lambert and Richeza of Lotharingia. He is known as the Restorer because he managed to reunite parts of the Kingdom of Poland after a period of turmoil. He reincorporated Masovia, and conquered Silesia and Pomerania. However, he failed to crown himself King of Poland, mainly because of internal and external threats to his rule.