Sergei Prokofiev (born in a Ukrainian village ruled by Russia) was a Russian 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 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.