Final answer:
Beethoven originally dedicated his Symphony No. 3 'Eroica' to Napoleon, but later crossed out the dedication and dedicated it to all the heroes of the world.
Step-by-step explanation:
Ludwig van Beethoven originally dedicated his Symphony No. 3 'Eroica' to Napoleon. However, Beethoven later became disillusioned with Napoleon and crossed out the dedication in a fit of anger, instead dedicating the symphony to all the heroes of the world.