Although the paper cut-out was Matisse's major medium in the final decade of his life, his first recorded use of the technique was in 1919 during the design of decor for the "Le chant du rossignol", an opera composed by Igor Stravinsky. Albert C. Barnes arranged for cardboard templates to be made of the unusual dimensions of the walls onto which Matisse, in his studio in Nice, fixed the composition of painted paper shapes. Another group of cut-outs were made between 1937 and 1938, while Matisse was working on the stage sets and costumes for Sergei Diaghilev's Ballets Russes. However, it was only after his operation that, bedridden, Matisse began to develop the cut-out technique as its own form, rather than its prior utilitarian origin.