Differentiate Romantic music from Classical music?

Romantic music immediately followed the Classical era so uses a lot of the same structure and basic harmonic principles, but pushed those principles to create new styles of music. While the Classical era was mostly focused on form, beauty, and balance, the Romantic era shifted focus to the individual and focused on emotion and the personal human experience. The symphony orchestra was also greatly expanded during the Romantic era and works became larger and more harmonically challenging.