 This action was successfully continued by his son and successor – Casimir III the Great.If not for the merits of his father, Casimir III would not have been able to have the threshold rule to pay the king of Bohemia and titular Polish king John of Luxembourg the gigantic sum of 1.2 million Prague groschen to cede his rights to the Polish crown, or to speak with the biggest European rulers as equals, or develop an economically unified state.As in the case of Mieszko I and Boleslaw the Brave, the father lies in the shadow of his son and successor.