Charles Rennie Mackintosh was the main representative of the Glasgow Four (that included Herbert MacNair and Macdonald sisters),who promoted Art novoue design. The main characteristics of Art Novoue are the dynamism and movement and the use of modern materials, particularly iron, glass, ceramics, and later concrete, to create unusual forms and larger open spaces.The Hill House chair's innovation inspired the values of simplicity, utility, and beauty of the arts and crafts movement. Also, It represents the Art Noveau movements by the organic lines, linear rhythm, creating a fusion between structure and ornament of the knotted net. And the use of iron material in the chair's form