Symphony that marked the beginning of Beethoven's "middle period"

EROICA

Originally dedicated to Napoleon before Beethoven famously scratched out his name in frustration.

Beethoven’s "Eroica" Symphony (officially Symphony No. 3) is widely recognized as the bold transition into his "middle period," where his music grew more complex and emotionally intense. The nickname "Eroica" (Italian for "heroic") reflects its grand, revolutionary spirit—originally dedicated to Napoleon before Beethoven famously scratched out the dedication in anger. The clue points directly to this landmark work, as it’s the most famous symphony marking that creative shift. No wordplay here, just a straightforward reference to a musical masterpiece.