This paper studies the activities of famous manufacturers of enamel ceramics in nineteenth century France such as Parvillée, Muller and Loebnitz. The study shows that these manufacurers collaborated with famous architects who supported the theory of architectural polychromy and they made many innovations with regard to the technics of enamel ceramics. Analysis of the discourses of Loebnitz reveals that these innovations were closely related to the revival of the medieval and early Renaissance architecture in nineteenth century. The result of these innovations was one of the factors which influenced the shift in aesthetical ideas around 1870s-1880s.
