Jan Fisar (Czech, b. 1933) worked as a designer for the Czech national glassworks in Zelezný Brod before establishing his private studio in the north Bohemian town of Nový Bor in the 1970s. He gained experience in the mold-melting technique of casting while working with the renowned artists Stanislav Libenský (Czech, 1921-2002) and Jaroslava Brychtová (Czech. b. 1924) on the creation of their monumental glass sculptures for Expo 67 in Montreal, Canada. The Inner Space is an important, early example of glass sculpture in this technique.