Although Kurt Schwitters was one of the most influential artists of international modernism, his immensely varied visual oeuvre has been only partially deciphered. For the first time, this three-volume catalogue raisonné documents and properly acknowledges his oeuvre as a whole. The fruits of worldwide research and a complete investigation of the artist's estate can now be presented: around four thousand works created between 1905 and 1948, including many paintings and drawings that have remained unpublished until now. Schwitters's works are arranged chronologically, and in each year, according to genres. Each work is reproduced in black-and-white; lost and destroyed works are documented. In addition, almost 120 representative works are also printed in color. The most extensive volume, the third, covers the period between 1937 to 1948. It contains the works Schwitters created while in exile, first in Norway and then in England after 1940. Colored sculptures, collages, and assemblages are made of a variety of materials, including objects found in nature, and they continue the artist's early Merz concept. Furthermore, two of the Merz buildings, Haus am Bakken and Merz Barn, the less-well-known Norwegian landscapes and drawings, and the portraits made during his internment in an English camp are also presented. The artist: Kurt Schwitters (Hanover 1887-1948 Kendal, Lake District). Studied at the Hanover school for applied arts and the Königlich Sächsische Akademie der Künste in Dresden. In 1911, first participation in an exhibition. In 1919, first Merz picture and publication of the poem An Anna Blume. After 1923, work on his Merzbau, publication of the Merz magazine. In 1937, defamation of his works, emigration to Norway. In 1940, flight to England. In 1943, destruction in an air raid of the original Merzbau and his home in Hanover.