facade, the glass curtain walls of this building demonstrated both the modernist principle that form reflects function and Gropius's concern with providing healthful conditions for the working class. The factory is now regarded as one of the crucial founding monuments of European modernism. Gropius was commissioned in 1913 to design a car for the Prussian Railroad Locomotive Works in Königsberg. This locomotive was unique and the first of its kind in Germany and perhaps in Europe. Other works of this early period include the office and factory building for the Werkbund Exhibition (1914) in Cologne. In 1913, Gropius published an article about "The Development of Industrial Buildings," which included about a dozen photographs of factories and grain elevators in North America. A very influential text, this article had a strong influence on other European modernists, including Le Corbusier and Erich Mendelsohn, both of whom reprinted Gropius's grain elevator pictures between 1920 and 1930. Gropius's career was interrupted by the outbreak of World War I in 1914. He was drafted August 1914 and served as a sergeant major at the Western front during the war years (getting wounded and almost killed) and then as a lieutenant in the signal corps. Gropius was awarded the Iron Cross twice ("when it still meant something," he confided to his friend Chester Nagel) after fighting for four years. Gropius then, like his father and his great-uncle Martin Gropius before him, became an architect. Bauhaus period (1919–1932) Gropius's career advanced in the postwar period. Henry van de Velde, the master of the Grand-Ducal Saxon School of Arts and Crafts in Weimar was asked to step down in 1915 due to his Belgian nationality. His recommendation for Gropius to succeed him led eventually to Gropius's appointment as master of the school in 1919. It was this academy which Gropius transformed into the world-famous Bauhaus (a.k.a. Gropius School of Arts), attracting a faculty that included Paul Klee, Johannes Itten, Josef Albers, Herbert Bayer, László Moholy-Nagy, Otto Bartning and Wassily Kandinsky. In principle, the Bauhaus represented an opportunity to extend beauty and quality to every home through well designed industrially produced objects. The Bauhaus program was experimental and the emphasis was theoretical. One example product of the Bauhaus was the armchair F 51, designed for the Bauhaus's directors room in 1920 – nowadays a re-edition in the market, manufactured by the German company TECTA/Lauenfoerde. In 1919, Gropius was involved