Ludwig Wenzel Lachnith (c. 1730–1790) was a Bohemian composer and violinist active in the Classical period. His work primarily encompasses chamber music, symphonies, and operatic compositions, reflecting the stylistic transition from the Baroque to the Classical era. Lachnith is best known for his contributions to string quartets and concertos, with notable works including his string quartets and a series of violin concertos that showcase his virtuosic writing and lyrical melodies. Though not as widely recognized as his contemporaries like Haydn or Mozart, Lachnith's music played a role in the development of chamber music forms, emphasizing clarity and balance. He was also associated with the cultural milieu of Prague, contributing to the city's vibrant musical scene during the 18th century. His compositions, while not extensively documented, are acknowledged for their charm and technical demands, influencing subsequent generations of composers in the region. Lachnith's impact lies in his ability to bridge the late Baroque and early Classical styles, helping to pave the way for the evolution of chamber music, although his works remain largely overlooked in the modern classical repertoire.