State Château in Duchcov (Dux) is an important monument quite popular due to its reach history and valuable heritage fund. Since the mid-sixties of the last century it has been carried out a renovation of the château including an entire château complex. Its aim was to open the premises to public and use them for various cultural and social occasions. The main target of implemented renovation works was to rectify inappropriate interventions from previous years and to restore the interior and exterior spaces to their original form. This study analyses the conception of a new interior installation and presentation of these premises in the southern wing, based on a survey of archive sources, furniture from the National Heritage Institute funds and other materials. The aim of the conception of new installation, finalized in 2017, was to commemmorate particular historical personalities of the Wallenstein family and the culture of living and lifestyle at their noble residence. The important sources determinative for the new installation were the restored historical wall paintings in the interiors. Another iconographic source and starting point for the installation of three rooms in a ladies apartment were three colored documentary paintings by Amalie von Peter (1807–1853), depicting the relevant interiors of the years of 1849–1850. These period pictorial sources were first identified and evaluated for the benefit of the heritage object which they document.