Because Bolesław was a minor when Władysław Odonic died on 5 June 1239, his elder brother Przemysł I ruled alone at first. Historians agree the territory the brothers inherited started out small, but disagree as to whether it extended beyond Ujście and Nakło in northern Poland. In 1241, Przemysł and Boleslaw began reclaiming the lands their father had lost. By 1243 the brothers regained most of the Duchies of Poznań and Gniezno, in 1244 Kalisz, in 1247 Santok, and in 1249 Wieluń. In 1244, Bolesław supported his brother in a conflict between the local nobility and the clergy led by the Bishop of Poznań Bogufał II for the privileges their father had granted shortly before his death. On 24 April 1245 Przemysł I acknowledged Boleslaw's coming of age by knighting him during a solemn Mass in honor of St. Adalbert of Prague in Gniezno, celebrated by Archbishop Pełka Liz.