Abstract: The subject of this research is the stylistic peculiarities and means of artistic expression of the architectural majolica by Peter Kuzmich Vaulin. The object of this research is the architectural ceramics of Vaulin in facades of the buildings of St. Petersburg in the early XX century. The application of inclusive approach allows tracing correlations between the historical facts and the cultural characteristics of this period. The compositional-artistic analysis, comparative-descriptive method, and imagery-stylistic analysis were used for consideration of the means of artistic expression of architectural ceramics, compositional interaction of the materials and space, and examination of the style and formative peculiarities of ceramics. Detailed analysis is conducted on the Saint Petersburg period of the ceramist P. K. Vaulin, opening of his own ceramic workshop, and active participation in the development of decorative image of St. Petersburg in the early XX century. Special attention is given to the most remarkable works of the master for architectural decoration of the city. Emphasis is placed on his works for the Insurance Company Building “Russia”, which is brilliant example of the harmonious synthesis of majolica and architecture. The conclusion is made that the architectural ceramics of the master made in many ways determined the majolica decoration of St. Petersburg – compositional, textured, color, imagery-stylistic, and plastic peculiarities of the ceramic works of P. K. Vaulin contributed to aesthetic transformation of the environment. The scientific novelty of consists in the thesis that the ceramic workshop of P. K. Vaulin was one of the leading manufacturers of artistic majolica of the indicated period. It is also proven that the Heldwein-Vaulin workshop was able to organically synthesize the heritage of the best traditions of the past with the courage and ambiguity of the Art Nouveau.