History of painting world with "wild", multi-colored, expressive, landscapes and figure paintings that the critics called Fauvism. Henri Matisse's second version of "The Dance" signifies a key point in his career and in the development of modern painting. It reflects Matisse's incipient fascination with primitive art: the intense warm colors against the cool blue-green background and the rhythmical succession of dancing nudes convey the feelings of emotional liberation and hedonism. Pablo Picasso made his first cubist paintings based on Cézanne's idea that all depiction of nature can be reduced to three solids: cube, sphere and cone. With the painting Les Demoiselles d'Avignon 1907,
Radiography of cultural objects Albert Museum, the artist painted over a previous picture that had not even dried yet. Pigments from the lower painting appear through cracks in the surface layer. The Old Guitarist by Pablo Picasso at the Art Institute of Chicago had been previously examined with visible and ultraviolet light, which had hinted at the possibility of an earlier composition. X-rays of the painting revealed that Picasso had originally painted two female figures behind the guitarist. The x-rays also penetrated far enough to reveal how Picasso had prepared the wooden panel for painting. X-rays can provide a better picture of plaster casts