Sergei Sergeyevich Prokofiev was a Russian 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, and nine completed piano sonatas.
A graduate of the St Petersburg Conservatory, Prokofiev initially made his name as an iconoclastic composer-pianist, achieving notoriety with a series of ferociously dissonant and virtuosic works for his instrument, including his first two piano concertos. In 1915 Prokofiev made a decisive break from the standard composer-pianist category with his orchestral Scythian Suite, compiled from music originally composed for a ballet commissioned by Sergei Diaghilev of the Ballets Russes.