His last opera, "The Stone Guest", is his most famous work, known as a pioneering effort in melodic recitative. With the orchestration and the end of the first scene left incomplete at his death, it was finished by César Cui and Nikolai Rimsky-Korsakov, and was much prized by The Five for what was perceived as its progressive approach to operatic expression. It was premiered in 1872, but never became a lasting standard operatic repertoire item.