At the Paris Universal Exposition of 1900, Sauvage designed a theater for the American dancer Loïe Fuller, working in collaboration Pierre Roche, Francis Jourdain and the ceramic artist Alexandre Bigot; a theater called le Guignol parisien; the exhibition stand for the firm of his father, Jolly fils et Sauvage; a power generating station which produced electricity for the exhibition, as well as Art Nouveau entrances for the Exposition of the Street organized by Frantz Jourdain. He also made several projects, not realized, for a buffet, decorative masts; a pavilion for the firm of Louis Majorelle, and another for the magazine "La mode pratique"