Franz Joseph Haydn, known as Joseph Haydn, was an Austrian composer, one of the most prolific and prominent of the Classical period.
A central characteristic of Haydn's music is the development of larger structures out of very short, simple musical motifs, often derived from standard accompanying figures. The music is often quite formally concentrated, and the important musical events of a movement can unfold rather quickly.
Haydn's work was central to the development of what came to be called sonata form. His practice, however, differed in some ways from that of Mozart and Beethoven, his younger contemporaries who likewise excelled in this form of composition. Haydn was particularly fond of the so-called "monothematic exposition", in which the music that establishes the dominant key is similar or identical to the opening theme. Haydn also differs from Mozart and Beethoven in his recapitulation sections, where he often rearranges the order of themes compared to the exposition and uses extensive thematic development.