The concerto was Ravel's penultimate composition. He had contemplated a piano concerto, based on Basque themes, in 1906; he returned to the idea in 1913, but abandoned work on the piece in 1914. Fifteen years elapsed before he turned once more to the idea of writing a concerto. He began sketching it in 1929 but throughout his career he had been a slow, painstaking worker, and it was nearly three years before the concerto was finished. He was obliged to put it to one side while he worked to a deadline to write another concerto, the D major, for the left hand, commissioned by Paul Wittgenstein.