 Other territories recovered by the Polish Crown in the 15th-century include the Duchy of Oświęcim and Duchy of Zator on Silesia's border with Lesser Poland, and there was notable progress regarding the incorporation of the Piast Masovian duchies into the Crown.The influence of the Jagiellonian dynasty in Central Europe rose during the 15th century.In 1471, Casimir's son Władysław became king of Bohemia, and in 1490, also of Hungary.