Romanticism in music emerged as a reaction to Enlightenment rationalism, emphasizing emotion, individualism, and imagination. Spanning from 1780 to 1850, it valued originality and experimentation, leading to new forms, harmonies, and techniques. Key composers like Beethoven, Chopin, and Wagner pushed boundaries in composition and performance. The era saw the rise of virtuoso performers, expansion of the orchestra, and development of expressive genres like character pieces and symphonic poems.