Beethoven's Pathetique sonata for piano, Op 13.
This Sonata in C minor was his first large work in this genre and a prime example of the late 18th century sonata. To this day it remains a source of fascination with its ardent pathos and emotional coherence. While first sketches probably date back to 1796, Beethoven did not complete the sonata until 1798/99, shortly after his string trio in C minor, op. 9 from 1797/98. He published the work in December 1799 in Vienna.