The Museum of Polish Culture and History, which is currently housed on the second floor of the castle, shows the eventful history of this institution. It documents the Polish-Swiss relations that have existed for several centuries as well as the activities of Swiss in Poland and of Poles in Switzerland.
The current library opened on June 20, 1987. She is housed in the "Burghof", a house directly on the castle hill. It consists of a reading room with a reference library and two other rooms. One houses part of the private collection of Jan Nowak-Jeziorański and his wife Jadwiga, and another the collection of documents and pictures from the Romer family from Cytowiany.