Conservation works in the Banqueting Hall, photo by W. Holnicki

The conservation and restoration work covered the interior of the Banqueting Hall on the top floor of the main body of the Palace, and both its staircases. The interior decor includes various decorations. The ceiling and coving are ornamented with 19th-century stuccowork. In the centre there is a plafond (an oil painting on canvas) with a representation of Aurora by Aleksander Kokular dating back to 1832. All walls have wall paintings with figural representations complementing the illusionistic architecture, ornamented with statues and bas-reliefs, painted as frescos in the early 18th century. Similar wall paintings decorate both staircases.

The works covered the whole room, except for the plafond, which was subject to conservation in 2004-2005. The conservation work started with preparing the photographic and descriptive documentation of the monument. In many places, conservators made stratigraphic uncoverings. Samples of paint layers and undercoats were taken for examination. Archival conservation and photographic documentation was also consulted.

A committee of Wilanów's experts and professional conservators took the decision to remove some parts of the infills and reconstructions due to their pictorial or compositional incorrectness.

Delaminated plaster and wall cracks glued with special injections, photo by W. Holnicki

Dirt was removed from paintings. As a result of these interventions, the paintings became visibly brighter and their colours more vibrant. Having cleaned the paintings of surface dirt, faulty retouches and reconstructions were removed. Delaminated plaster and wall cracks were glued with special injections. Inappropriate plaster infills were removed. Damaged parts of the undercoat were waterproofed. All undercoat defects were repaired and dyed engobes were applied to prepare the ground for retouching and reconstruction work on the paint coat. A similar range of works was carried out on the paintings on the staircases. Subsequent works focused on filling in the paint cover in the Banqueting Hall and its staircases.

Cleaning of the 18th-century stucco surfaces, photo by J. Andrzejewski

Secondary paint accumulation on virtually all decorated surfaces was removed from the ceiling in the Banqueting Hall, with any damaged details fixed and cracks glued. Secondary accumulation and faulty infills were also removed from the 18th-century stuccowork on the staircases, and the stucco surface was cleaned. Having cleaned the decorations on the landing in the northern staircase, it was established that it had been reconstructed, probably in the 19th century, on the basis of the structure preserved on the southern side. After the secondary accumulation of paint was removed from the ceiling in the Banqueting Hall and the contact surface was cleaned, defects were repaired and the damaged parts of the decoration were restored. Plaster casts were prepared for the missing floral themes in the interlace patterns. Structural reinforcements were made in the deteriorated parts of the ceiling and coving. Following the filling-in of decoration defects in the stuccowork on the staircases, the team proceeded to restore its original colour.