Immediate work and securing is required by the two-level steel-reinforced concrete structure. There are visible cracks in the underside of the reinforced concrete panels of the upper roof level and in the locations of the steel support frame anchoring. Steel elements of the skylight glazing are corroded and most windows cracked. The upper reinforced concrete panel is damp, the ceiling inside the gallery is scratched cracked at the corners by the walls; there are also stains and patches of moisture and salinity. This is the result of a poor technical solution for the drainage of rainwater with rain channels on the gallery roofs. The gutters here were sealed over a dozen years ago, while the exterior walls, especially from the shaded side of the courtyard, and the exhibition hall ceilings are inadequately thermally insulated. The unstable humidity and temperature, as well as the microbiological conditions, are influenced by the aluminium windows in the gallery’s gable walls. Necessary works include replacing the structure of the gallery with a new one, partial interior thermal insulation of the walls of the palace and exhibition halls, the elimination of disused rainbeds and gutters, as well as a better technical solution for rainwater drainage. Renovation and modernisation works will allow for a complete revaluation of nearly 3 thousand square metres of historical palace spaces.