The Chantier typeface family is a mix between the Egizio of the Nebiolo foundry, of which I was able to consult a copy in the archives of the Staatsbibliothek in Berlin, and typefaces from samples of posters in the collections of printed objects in the Museum of Brittany. It consists of four styles, including an open variant called "Constructed", which raises the question of the form to be given to a font "under construction" and how to show through the shape of a letter the steps in the manufacture of a typeface.