In 1246 Mieszko II the Fat died without issue, leaving in his will all his lands to his brother Władysław. Soon after, the new duke failed to maintain in his hands the fortress of Lelów, acquired by Mieszko II three years before. Despite this bad beginning of his rule, Władysław made skillful maneuverings with the other Piast Duchies, who allowed to him to maintain his frontiers. By the first half of the 13th century, Władysław's relations with the Dukes of Greater Poland were normalized. Władysław finally gave up his claims over Kalisz and Wieluń, and as a part of his new alliance with Greater Poland, he married Euphemia, sister of Przemysł I.