Kelly Conway, curator of American glass at the Corning Museum of Glass in Corning, New York, discusses the understudied aspect of Tiffany’s virtuosity. In the late 19th and early 20th centuries, Louis Comfort Tiffany directed an artistic empire in the design and creation of stained glass windows and lamps, blown glass vases, and other objects of luxury. But his innovations in glass mosaics represented perhaps his most expressive mastery of the medium.