Serse January, the third by 6 February, and Handel put the finishing touches to the score on 14 February. "Serse" was first performed at the King's Theatre, Haymarket on 15 April 1738. The first production was a complete failure. The audience may have been confused by the innovative nature of the work. Unlike his other operas for London, Handel included comic ("buffo") elements in "Serse". Although this had been typical for 17th-century Venetian works such as Cavalli's original setting of the libretto, by the 1730s an "opera seria" was expected to be wholly serious, with no mixing of the genres of
Music of Germany for the Royal Fireworks and the oratorio Messiah. Another important composer was Georg Philipp Telemann, one of the most prolific musicians in history. By the middle of the 18th century, the cities of Vienna, Dresden, Berlin and Mannheim had become the center for orchestral music. The Esterházy princes of Vienna, for example, were the patrons of Joseph Haydn, an Austrian who invented the classic format of the string quartet, symphony and sonata. Later that century, Vienna's Wolfgang Amadeus Mozart emerged, mixing German and Italian traditions into his own style. Mozart was a prolific and influential composer who composed over 600