In the Classical period Joseph Haydn (1732-1809) wrote a few concertos including two for the cello, but he is better known for his symphonies. It was Wolfgang Amadeus Mozart (1756-1791) who wrote many wonderful piano concertos. This was at a time when the piano was a new instrument. Mozart was a brilliant pianist and he wrote most of them for himself to perform. He also wrote five violin concertos, four horn concertos, two flute concertos and a clarinet concerto. He also wrote concertos for more than one soloist e.g. a flute and harp concerto and a violin and viola concerto which he called "Sinfonia Concertante". By this time concertos always had three movements: a fast one (usually in sonata form), a slow one, and a fast movement (often a rondo) to finish with.