Franz Xaver ( 1791-1844 ) was the sixth child and younger surviving son of Wolfgang Amadeus and Constanze Mozart. He was trained by Hummel, Salieri and others, and had his first works published in 1802. After teaching in Lemberg, he lived there as a freelance musician, 1813-38, making a long concert tour, 1819-21. Later he lived in Vienna. He composed a wide range of piano music (concertos, sonatas, etc), some of which looks forward to the piano style of Chopin and Liszt. His output also includes songs and other vocal music. His brother, Carl Thomas (1784-1858), was the Mozarts other surviving son.