Once the piano became popular in the late 18th century many composers wrote music for the piano. Wolfgang Amadeus Mozart started to learn on harpsichords when he was very small, but the piano was becoming popular when he was a young man and he wrote many sonatas and concertos for the piano. Franz Joseph Haydn also wrote a lot of piano music. Ludwig van Beethoven was a very famous pianist before he became very famous as a composer. His piano compositions include 5 concertos and 32 sonatas. In the Romantic period many composers wrote for the piano. They include Franz Schubert, Robert Schumann, Johannes Brahms, Franz Liszt and Frederic Chopin. Later composers include Sergei Rachmaninoff, Claude Debussy, Maurice Ravel, Sergei Prokofiev, Dmitri Shostakovich and Bela Bartok.