The original building in Jesenice was constructed in 1521 and was known as the "old castle of Bela peč" after the family's home town in present-day Italy. The second significant date for the house was the year 1821 when the then owner, a marchant named Frančišek Pavel Kos from Jesenice, expanded and reconstructed it in the Calssical style. In the time before the Second World War, the ground floor of the "old school", as it was known by the local people, serves as a law-court and prison. During the occupation, the German army seized, among other buildings , the Kos Manor House and used it as transit prison. This period is documented in the exhibition entitled, "Occupation Terror in Years 1941-1945". The remaining rooms on the ground floor have been remodeled into a Gallery. On the first floor is the permanent exhibition, "Workers's Movements and the NOB (National Fight for Indepedence) in Jesenice. On the second floor, in addition to a multipurpose room for cultural events, is a wedding hall.