The interiors, mostly renovated in the Neo-Gothic style, are furnished with valuable pieces of furniture, some of which feature custom wood carvings commissioned for the museum. Neither the style nor the furniture of the castle have been changed since its reconstruction in the Romantic style was completed. The castle picture gallery contains several valuable Czech and European paintings from artists of the Late Renaissance and Baroque eras, such as Bartholomeus Spranger, Karel Škréta, Jan Kupecký, and Norbert Grund. Among them the painting of Perchta, "the White Lady" of Rožmberk, one of the most famous ghosts in Bohemia. She has supposedly appeared several times during the centuries since her death. A local legend has it that if one understands what is written in secret signs on the picture, this one would free her and find a silver treasure.