sentences:  After the war, Buchheim worked as an artist, art collector, gallery owner, art auctioneer and art publisher.Through the 1950s and 1960s, he established an art publishing house, and he wrote books on Georges Braque, Max Beckmann, Otto Mueller and Pablo Picasso.He collected works by French and German Expressionist artists, from groups including Die Brücke and Der Blaue Reiter, such as Ernst Ludwig Kirchner, Max Pechstein, Emil Nolde, Wassily Kandinsky, Paul Klee, Franz Marc, Gabriele Münter, Alexej von Jawlensky, and Max Beckmann.