Marcel Breuer was one of the great pioneers of tubolarsteel chair design, and as early as 1925 he had invented a series of system employing continuosly bent steel tubes to form the structural frames of stools, chair and tables. His "Wassily" chair of the same year, which is still in production today, was the first chair in tubolar steel, and has become a classic of modern design. Although Breuer early student work, and even the "Wassilily" chair with its daring spatial arrangement, show the influence of the aesthetics of the Stijl and Constructivism, his interest soon shifted to a more practical concern with standardisation and economical mass-production.