Sanssouci Palace in the style of the Frederician Rococo, and Karl Friedrich Schinkel, who designed the interiors at Charlottenhof Palace. The spectrum of rare, luxury surfaces in the Prussian palaces and their [...] in 2014, of the technically complex and intricately designed ceiling of the Grotto Hall in the New Palace that included an abundance of minerals, precious and semi-precious stones, glass stones, colored [...] years of experience and accumulated knowledge, both of the special workmanship used in the Prussian palaces and of those employed in modern restoration. The staff carries out the work or supervises its im