The present book fills an important lacuna: it is the first art book dedicated to the Dassiers, the only medallists of the eighteenth century to be honoured with a citation in the Encyclopédie of Diderot and d'Alembert. 'Fascinating artists', in the words of the art historian Marcel Rúthlisberger, they created a genre of medals appreciated in all of Europe. With his perfect mastery of the subject, the author guides the reader through the high points of the Dassiers' production, placing it within its historical and artistic perspectives, without neglecting its political and economic aspects.