Paintings, graphic works, sculptures, textiles and furniture – Johannes Itten was an unusually versatile artist who during the six decades of his creative career also produced one of the most important works on the theory of colours in the twentieth century. His artistic work is examined here for the first time scientifically on the basis of 120,000 biographical documents and sources and is being expanded in comparison with the catalogue raisonné of 1972 by more than 1,000 works from all creative periods. The three-volume catalogue raisonné includes the latest provenance research, an index of exhibitions and literature and provides for the first time a complete overview of the artistic cosmos of Johannes Itten.