Charles Rennie Mackintosh was one of the great representatives of Art Nouveau. Together with his wife Margaret McDonald, her sister Frances, and his brother-in-law Herbert McNair, he developed an original style that set itself apart from the decorative floral style of Jugendstil. The group's geometric, almost cubist designs for furniture show the influence of Japanese spacial concepts and are distinguished by their elongated, severe forms. A typical aspect of their work is a formal scheme based on horizontal and vertical lines, occasionally combined with slightly curved linear ornamentation.