Sergei Sergeyevich Prokofiev (/prəˈkɒfiɛf, proʊ-, -ˈkɔː-, -ˈkoʊ-, -jɛf, -jɛv, -iəf/; Russian:Сергей Сергеевич Прокофьев, tr.Sergej Sergeevič Prokof'ev; 11/23 April 1891 – 5 March 1953) was a Russian and Soviet composer, pianist and conductor. As the creator of acknowledged masterpieces across numerous musical genres, he is regarded as one of the major composers of the 20th century. His works include such widely heard works as the March from The Love for Three Oranges, the suite Lieutenant Kijé, the ballet Romeo and Juliet – from which "Dance of the Knights" is taken – and Peter and the Wolf. Of the established forms and genres in which he worked, he created – excluding juvenilia – seven completed operas, seven symphonies, eight ballets, five piano concertos, two violin concertos, a cello concerto, a Symphony-Concerto for cello and orchestra, and nine completed piano sonatas.