In the 1840s, King Oscar I commissioned a restoration of the building by architect George Theodor Chiewitz. Sculptures and other plasterwork ornamental features were painted grey and added to the façade, which was originally yellow and without decoration. The ionic columns at the gables were replaced by new columns in Italian marble. The glass wall of the Hall of Mirrors was re-worked with new, thin bronze glazing-bars and the outdoor stairway was clad in white marble. The dining room was decorated in a Pompeian style, including the ceiling.