sentences:  The regency ended in 1462, when Konrad III attained his majority and became in the legal guardian of his younger brothers.At the beginning of 1462 arrived the news of the deaths of the neighboring Dukes of Płock, Siemowit VI and Władysław II without heirs.Konrad III, as the closest male relative and hoping to reunited the whole Masovian lands, immediately assumed the title of Duke of Płock.