Johan Algot Haquinius (1885–1971) was a Swedish composer and conductor, primarily known for his contributions to classical music and choral works. He played a significant role in the Swedish music scene during the 20th century, focusing on vocal music and orchestral compositions. Haquinius's notable works include his choral pieces, which often drew inspiration from Swedish folk traditions, and orchestral works that showcased his distinctive melodic style. His compositions are characterized by their lyrical quality and rich harmonies, reflecting his deep understanding of the choral medium. One of his most recognized contributions is his work with Swedish choirs, where he emphasized the importance of vocal technique and ensemble cohesion. In addition to his compositions, Haquinius was a dedicated educator, influencing generations of musicians through his teaching and conducting. His impact on Swedish music is marked by his promotion of choral singing and his efforts to elevate the status of Swedish composers in the broader European context. Through his works and educational endeavors, Haquinius left a lasting legacy in the realm of choral and classical music in Sweden.