Romantic era music
Main article: Romantic music
See also: List of Romantic composers

The music of the Romantic era, from 1820 to 1910, was characterized by increased attention to melody and rhythm, as well as expressive and emotional elements, paralleling romanticism in other art forms. Musical forms began to break from the Classical era forms (even as those were being codified), with free-form pieces like nocturnes, fantasias, and preludes being written where accepted ideas about the exposition and development of themes were ignored or minimized.[24] The music became more chromatic, dissonant, and tonally colorful, with tensions (with respect to accepted norms of the older forms) about key signatures increasing.[25]

from the classical music page of wikipedia.
The Music in the background of my videos are a selection of Nocturnes by Chopin.