ドイツ工作連盟
In 1926, he joined "Der Ring", an artist's society, and in 1927 was appointed as construction manager of the Weissenhof Estate in Stuttgart, a modern architectural project supervised by Mies van der Rohe. He became a member of the Deutscher Werkbund in 1928, and in that same year collaborated on the Congrès International d'Architecture Moderne.