Зембицкое княжество
After the death of Hynek Krušina of Lichtenburg, Lord of Glatz in 1454, George of Poděbrady acquired most of the possessions Hynek left behind, under a preliminary contract Hynek had signed shortly before his death. These included the Častolovice inheritance, which included the Lordship of Glatz, which George raised to a county in 1459. In 1456, he bought the Duchy of Münsterberg from Ernest of Opava. This gave him significant influence in Silesia, which would provide the political and economic basis for his descendants. They founded as Dukes of Münsterberg, Oels, Bernstadt and Opava the Silesian branch of the family known in Czech as . Even after they lost the Duchy of Münsterberg and sold the County of Glatz in 1501, the Silesian branch of the family continued to call themselves "Duke of Münsterberg" and "Count of Glatz" until the branch died out in 1647.