The manufacture of a bell requires a great deal of expertise across several steps. First, a refractory brick core, and then, a false bell made of clay are built, according to the templates of the future bell. The wax decorations are applied. The false bell is then covered with a mixture of clay, horse dung, and goat hair. At that moment, the mould is heated from underneath: the wax decorations thus melt, leaving their imprint in the cope. Finally, the false bell is broken down, and the molten bronze is poured into its void. A process perfectly mastered by Cornille-Havard.