Johann Joseph Fux was an Austrian composer and music theorist who wrote:
* Gradus ad Parnassum (Steps to Parnassus), a highly influential treatise on counterpoint published in 1725. It remains a foundational work in music theory and composition.
* The Secrets of Counterpoint, a collection of lessons and exercises for aspiring composers.
* Concentus Musicus, a collection of sacred works.
* Compositions for keyboard, including sonatas, toccatas, and fugues.
While Fux composed a variety of music, his most enduring work is Gradus ad Parnassum, which has had a significant impact on music education and composition for centuries.