Paul Klee, Red Balloon (Roter Ballon), 1922. Oil (and oil transfer drawing?) on chalk-primed gauze, mounted on board, 12 1/2 × 12 1/4 inches (31.7 × 31.1 cm). Solomon R. Guggenheim Museum, New York
Tree Nursery (detail) — Paul Klee, 1929, oil on incised gesso on canvas. Phillips Collection, Washington, DC, USA. This artwork is in the public domain because the artist died more than 70 years ago. Photograp More
Tree Nursery — Paul Klee, 1929, oil on incised gesso on canvas. Phillips Collection, Washington, DC, USA. This artwork is in the public domain because the artist died more than 70 years ago. Photography was pe More
Exhibit in the Art Institute of Chicago, Chicago, Illinois, USA. Public domain photograph of painting, 19th century, free to use, no copyright restrictions image - Picryl description