Paintings, graphics, sculptures, textiles, and furniture - Johannes Itten was an exceptionally versatile artist who, during his six decades of creative work, also developed one of the most significant color theories of the 20th century. His artistic oeuvre is being explored for the first time scientifically based on 120,000 biographical documents and sources, and it has been expanded by more than 1,000 works from all periods of his creativity compared to the catalog from 1972. The three-volume catalog provides, with the latest provenance research, exhibition, and bibliography, a complete overview of Johannes Itten's artistic cosmos for the first time.