The castle Palanok "Plankenburg" is located on a mountain cone of volcanic origin west of the town of Mukachevo in Transcarpathia. The origins of the castle complex go back to the 14th century.
The castle has seen a changeable development. After the Rákóczi family, who owned the castle until 1711, Emperor Charles VI. the castle and the lands around Mukachevo in 1726 to the Mainz elector-archbishop Lothar Franz von Schönborn. The possessions remained in the possession of the Counts of Schönborn until the 20th century.
Later the castle was used as a barracks and prison, over time it was rebuilt as a fortress and today it houses a museum dedicated to the history of the castle and the town of Mukachevo.