Absolute music is music that is not explicitly "about" anything; in contrast to program music, it is non-representational. The idea of absolute music developed at the end of the 18th century in the writings of authors of early German Romanticism, such as Wilhelm Heinrich Wackenroder, Ludwig Tieck and E. T. A. Hoffmann, but the term was not coined until 1846 when it was first used by Richard Wagner in a programme to Beethoven's Ninth Symphony.