Carl August Thielo (1785–1856) was a German composer, conductor, and music educator primarily known for his contributions to choral and vocal music. He was active during the early Romantic period and is notable for his sacred works, which often reflect the emotional depth characteristic of the era. Thielo's most significant contributions include numerous choral compositions, hymns, and cantatas, which were widely performed in churches, particularly in Germany. His ability to blend traditional forms with emerging Romantic sensibilities allowed his music to resonate with both contemporary audiences and future generations of composers. Though not as widely recognized as some of his contemporaries, Thielo's work had a lasting impact on the development of choral music, particularly through his emphasis on expressive vocal lines and harmonic richness. His pedagogical efforts also helped to shape the next generation of musicians, as he was involved in music education throughout his life. Thielo's music is often performed in choral settings today, contributing to the ongoing appreciation of 19th-century German choral repertoire. His legacy lies in his ability to bridge classical traditions and the burgeoning Romantic style.