Casimir I the Restorer

Casimir I the Restorer (Polish: Kazimierz I Odnowiciel; b. Kraków, 25 July 1016 - d. Poznań, 28 November 1058), was a Duke of Poland. He was a part of the Piast dynasty and father of Boleslaw II. He is known as "the Restorer" because he reunited the Polish Kingdom.