Sergei Sergeyevich Prokofiev is today acknowledged as one of the great composers of the 20th century, although he struggled against artistic and political oppression in the Stalinist Soviet Union during his lifetime. One of his biographers called him paradoxically one of the best-loved yet one of the least-known of 20th century composers. Among his many enduring works are The Love for Three Oranges, the Lieutenant Kijé Suite, the ballet Romeo and Juliet, and Peter and the Wolf. He married a Spanish singer, Carolina (Lina) Codina, and the couple had two sons. Prokofiev's autobiography and diaries were published after his death.