The Konin Coal-basin Museum, the first state museum in the region, was created in 1966 by a vote of the County Council. In 1975, because of the new administrative division of Poland, the museum achieved the rank of district museum.

Since then it has started to develop dynamically. In July 1998 the Museum was transferred to new location in a nearby village of Gosławice. It incorporated two ex manor buildings, adapted for the office area. Exhibiting in the main location, the castle, started in 1986. In 1987 the Museum, in the contest Museum Event of the Year, was awarded the prize of the 1st degree by the Minister of Art and Culture for all the works connected to the starting of activities. The following awards were given for the exhibitions, "Myth and Symbolism", "Born in Turek - Henryk Henoch Glicenstein" and "Holy Mary Famed by God".

In January 1990 the first visitors saw the exhibition "Polish Mansion" opened in the reconstructed manor house. The seat of the museum is the tower less castle erected between 1420 and 1426 on the south-east shore of the Gosławskie Lake by one of the most distinguished diplomats of the Jagiellonian era, the Poznań bishop Andrzej Łaskarz of Godzięba.

The castle was built on a narrow sandbank, closed by a swamp from the west and by the lake from the north. From the south the marshes, and most likely the moat, made access more difficult. The castle consists of the two buildings standing parallel to each other on the north - south axis.

After the administrative reform in 1975, the Regional Superintendent of Historical Monuments became interested in the castle. It was decided to rebuild and adapt it to become a location of the District Museum, which did not have a proper seat at that time. The renovation was carried out in 1978 - 1986.

The Gothic basements house the permanent exhibitions: archeological and natural history. On the ground floor there are also permanent exhibitions of Konin's history, Jewish culture and lamps. The 1st floor of the western wing has the temporary exhibitions (about 200 square meters). The permanent exhibition of the patriotic jewelry dating from the late 18th century to the late 1930s is located in the eastern wing.