Franz Liszt was a Hungarian composer and pianist who is widely considered to be one of the greatest pianists of all time. His works include the Etude and Sonata, both of which are musical compositions for solo piano. The Etude is a short piece of music that focuses on a particular technical skill, while the Sonata is a longer, more complex work that typically has multiple movements. Both of these works are considered to be some of Liszt's most important contributions to the world of classical music.