Unlike other pianists, Frédéric Chopin believed that this key's scale was the most difficult to play. Symphonies in this key include Mozart's "Jupiter" Symphony, both Schubert's sixth and ninth, which are nicknamed "The Little" and "The Great" variety of this key, and George Bizet's first symphony. 
Unlike other pianists, Frédéric Chopin believed that this key's scale was the most difficult to play. Symphonies in this key include Mozart's "Jupiter" Symphony, both Schubert's sixth and ninth, which are nicknamed "The Little" and "The Great" variety of this key, and George Bizet's first symphony. One work in this key's relative minor is Rachmaninoff's Rhapsody on a Theme of Paganini, and Rachmaninoff's second piano concerto was written in this key's parallel minor which has three flats in its key signature. For 10 points, name this key signature, the relative major of A minor, often considered the simplest of the key signatures in that it has no sharps or flats.
Unlike other pianists, Frédéric Chopin believed that this key's scale was the most difficult to play.
{C} major