 His son, Casimir III the Great, inherited Lesser Poland, the Duchy of Sandomierz, Greater Poland, Kuyavia, and the Duchies of Łęczyca and Sieradz.However, Silesia and Lubusz Land to the west, along with Gdańsk Pomerania, Western Pomerania, and Mazovia to the north, still remained outside the kingdom's borders.Nevertheless, Władysław's reign was a major step on the road to restoration of the Kingdom of Poland.