Johann Joseph Fux

Johann Joseph Fux (German: [ˈjoːhan ˈjoːzɛf ˈfʊks]; c. 1660 – 13 February 1741) was an Austrian composer, music theorist and pedagogue of the late Baroque era. His most enduring work is not a musical composition but his treatise on counterpoint, Gradus ad Parnassum, which has become the single most influential book on the Palestrinian style of Renaissance polyphony.