The term 'Beethoven Piece' can refer to three different works by the famous composer Ludwig van Beethoven: Eroica, Sonata, and Opus. Eroica is a symphony composed in 1803-1804 and dedicated to Napoleon Bonaparte, although the dedication was later revoked when Napoleon declared himself Emperor of the French. Sonata is a form of musical composition for one or two instruments, and Beethoven wrote 32 piano sonatas. Opus is a Latin word meaning 'work', and Beethoven wrote nine symphonies, 16 string quartets, and many other works.