The sumptuous room featured stucco by C.E. Brenno and a plafond by Hendrick Krock. The main hall has the plafond frescoed in 1760. The diameter of the plafond is 16 meters. Nowadays the decorated plafond of Kazanskiy railway station looks very contrast. While he was working on the plafond of St Isaac's Cathedral, his health suddenly deteriorated. The interior was decorated with bright colours, with pale-coloured walls and an oval plafond. Ehrenstrahl made the large religious paintings and Sylvius painted the plafond. Based on this design, the illuminating plafond of the hall was installed with colored glass. A plafond can be a product of monumental painting or sculpture. From 1984 to 1991 he had a radio show, "Ronflonflon met Jacques Plafond".