Johann Gottfried Eckard (1735–1809) was a German composer, pianist, and music theorist associated primarily with the Classical genre. Born in the Duchy of Württemberg, he studied under notable figures such as Georg Philipp Telemann and was influenced by the works of J.S. Bach and C.P.E. Bach. Eckard is best known for his keyboard compositions, including sonatas, variations, and concertos, which showcase his innovative use of harmony and structure. His notable works include "Sechs Sonaten für das Clavier" (Six Sonatas for Keyboard) and various chamber pieces that reflect the stylistic transitions of the late Baroque to early Classical periods. Eckard also contributed to music theory, publishing treatises that explored the relationship between music and mathematics, enhancing the understanding of musical composition. While he may not be as widely recognized as his contemporaries, Eckard's contributions laid groundwork for the development of piano music and influenced later composers. His blending of Baroque sensibilities with emerging Classical forms helped bridge the two eras, making him a significant figure in the transition of Western classical music.