During the Universal Exhibition of 1900 Daum was awarded a ‘Grand Prix’ medal. Daum glass became more elaborate, acid etching was often combined with carving, enamelling and engraving on a single piece of glass to produce creative glass master-pieces. The Daum brothers quickly moved on to become one of the major forces in the Art Nouveau movement, seriously rivalling Gallé, so much so that when Émile Gallé died in 1904 they became the leaders in the field of decorative glass.