Paul Klee (1879-1940) is one of the most significant and best-loved artists of the twentieth century. For the nine volumes of this landmark project, the Berne-based Paul Klee Foundation has researched the artist's 9,600 drawings, prints, watercolors, and oil paintings, allowing the artist's complete works to be assembled and published for the first time. Each volume contains an introduction in German and English, an explanation of the catalogue system, a German-English glossary, a bibliography, and indexes. All the entries are illustrated and include catalogue numbers, technical descriptions, measurements, references to related works, details of provenance and location, relevant literature, and a list of exhibitions and auctions in which works have appeared. Klee's own entries from the catalogue he maintained from 1911 onward are also included, and the most important works are illustrated in color. From 1927 to 1930, Klee's teaching at the Bauhaus in Dessau was interspersed with trips abroad. These included a journey up the Nile to see the famous monuments at Luxor, Karnak, Thebes, and other ancient Egyptian sites, as well as visits to the south of France and northern Italy—all valuable sources of visual inspiration. In 1930, to celebrate Klee's fiftieth birthday, a major exhibition of his work was held in Berlin, followed by another at the Museum of Modern Art, New York. Over 1000 illustrations, 100 in color.