Based on a comparative analysis of previously unpublished archival sources, the article provides information on the furnishings of Hmeljnik Castle from the beginning of the seventeenth to the beginning of the twentieth century. The painting collections of the Barons Ruessenstein and Zierheimb, who owned Hmeljnik in the seventeenth century, are presented in detail, and the inventories from the time of the Barons Wambolt provide a more detailed insight into the castle furnishings of the late nineteenth and early twentieth centuries. Supplemented by the transcription of selected sources, the article lays the foundation for further research into the castle interiors, as the analysis of these and other surviving documents reveals their appearance before the major renovation of the castle and the relocation of the Frischau furnishings to Hmeljnik in the second half of the 1920s.