Rudolf Steiner (1861-1925) was one of the most significant reformers of the twentieth century. He founded the Waldorf school movement, made vital contributions to alternative agriculture and medicine and also left behind a comprehensive oeuvre as an architect, designer and artist. Steiner's most important work of architecture, the Goetheanum (1924-1928) in Dornach, Switzerland, is a key work of early modern architecture: never before had concrete...