Bolesław III died on 28 October 1138. In his will, he divided Poland between his sons. As the oldest son, the supreme authority in the country was assigned to Władysław II with the title of high duke ("princeps"). In addition to Silesia, he received the Seniorate Province (which included Lesser Poland, eastern Greater Poland and western Kuyavia) and the authority over Pomerania. His half-brothers Boleslaw IV, Mieszko III and Henry received hereditary fiefs as junior dukes. In addition, Władysław II would also receive the lands of Łęczyca, then granted by Bolesław III to his widow, Salomea of Berg, for life as her dower and to revert to the Seniorate Province upon her death.