The Sheet Music for Classical Piano includes music from the Baroque, Classical and Romantic Era. It features the great composers Joseph Haydn, Wolfgang Amadeus Mozart, Ludwig van Beethoven, Franz Schubert, Muzio Clementi, Antonio Salieri, Leopold Mozart, Johann Christian Bach, Carl Philipp Emanuel Bach, and Christoph Willibald Gluck, Beethoven is regarded either as a Romantic composer or a Classical period composer who was part of the transition to the Romantic era. Franz Schubert is also a transitional figure, as were Johann Nepomuk Hummel, Luigi Cherubini, and Carl Maria von Weber. The period is sometimes referred to as the era of Viennese Classic or Classicism.