The neoclassical and classical periods spanned from 1720 to 1827. This era saw the rise of instrumental music and genres like the symphony. Music became simpler and appealed to the growing middle class audience. Composers during this period included Joseph Haydn, Wolfgang Amadeus Mozart, and Ludwig van Beethoven. They developed musical forms like theme and variations and rondo. Orchestras increased in size and compositions were numbered by order rather than tempo.