<P> Franz Peter Schubert (German: (ˈfʁant͡s ˈʃuːbɐt); 31 January 1797--19 November 1828) was an Austrian composer . </P> <P> Schubert died at age 31, but was extremely prolific during his lifetime . His output consists of over 600 secular vocal works (mainly Lieder), seven complete symphonies, sacred music, operas, incidental music and a large body of chamber and piano music . </P> <P> Appreciation of Schubert's music while he was alive was limited to a relatively small circle of admirers in Vienna, but interest in his work increased significantly in the decades following his death . Felix Mendelssohn, Robert Schumann, Franz Liszt, Johannes Brahms and other 19th - century composers discovered and championed his works . Today, Schubert is ranked among the greatest composers of the late Classical and early Romantic eras and is one of the most frequently performed composers of the early 19th century . </P>

What type of song did schubert specialize in