Daum is a crystal studio based in Nancy, France, founded in 1878 by Jean Daum. His sons, Auguste Daum and Antonin Daum, oversaw its growth during the burgeoning Art Nouveau period. Currently Daum is the only commercial crystal manufacturer employing the pâte de verre (glass paste) process for art glass and crystal sculptures, a technique in which crushed glass is packed into a refractory mould and then fused in a kiln.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 most complicated creations also feature applied glass elements, such as handles and ornamental motifs in naturalistic forms.