 The didones, in particular, made it possible for the First French Empire to employ typefaces very different from the typefaces used by the kings from the Ancien Régime.Examples of Didones include Bodoni and Walbaum.Also called mechanical, slab serif, or "mécanes", the name of this group evokes the mechanical aspect of these typefaces, which coincide with the Industrial Revolution at the beginning of the 19th century.