Composed in Nice, at the Hôtel Régina where the painter had been living since 1949, The Sadness of the King, a 1952 painting nearly four meters by three, is one of the last great works of Matisse. It was created using the cut-paper technique: the painter, immobilized by illness, cuts shapes from sheets of paper previously coated with gouache. He directs an assistant who pins them and moves them on the wall until the desired balance is achieved. Scissors, handled with dexterity, thus henceforth replace pencils and brushes. The pure tones used in the composition eliminate all shading and allow the painter to play solely on the relationships between colors and, above all, on contrasts: black and white (considered by Matisse as colors in their own right), red and blue, green and yellow...