The acoustic properties of the concert hall of the Berlin State Opera (1741, Georg Wenzeslaus von Knobelsdorff) were improved during the renovation in order to achieve a better reverberation time. The roof ceiling was raised by 4.00 m, creating space between the top tier and the ceiling for a reverberation gallery with reflective and absorptive components. A mesh of fiber-reinforced phosphate ceramics of approximately 250 m² is presented to the wall cladding as a visual room closure. The mesh size varies according to the parametric geometry development from about 20 cm edge length to flat areas without openings at the upper edge with rod diameters of about 3.5 cm. The molds are milled from a dense foam using a CNC 5-axis robot. The ceramic mass is then cast in alternating layers of fiber. The basket arch geometry allows for segmental prefabrication of identical structural elements with dimensions of 3.50 m by 4.00 m. Since this is a new material, the material behavior and mechanical properties of the material had to be researched. This was done in close cooperation with ITKE, University of Stuttgart.