Casimir I the Restorer not supported by modern historians. Regardless, he left church work for good in 1031. Casimir's father, Mieszko II, was crowned King of Poland in 1025 after the death of his father Bolesław I the Brave. However, the powerful magnates of the country feared a strong central government like the one that existed under Bolesław I's rule. This led to considerable friction between the King and the nobility. Taking advantage of the King's precarious situation, Mieszko II's older half-brother Bezprym and younger brother Otto turned against him and allied themselves with the Holy Roman Emperor Conrad II, whose forces attacked Poland
Mieszko II Lambert talented ruler. Since Mieszko II was politically active before his father's death, Bolesław I appointed him as his successor. He participated mainly in German politics, both as a representative of his father and the commander of the Polish troops. In 1013 Mieszko II went to Magdeburg, where he paid homage to the Emperor Henry II. A few months later Bolesław I paid homage in person. The real purpose of Mieszko's visit is unclear, especially since soon after his father paid homage to the Holy Roman Empire. Presumably, the young prince paid homage for Milsko or Moravia and Lusatia. The relevant