Lodewijk Mortelmans (1868–1944) was a Belgian composer and music teacher, primarily known for his contributions to classical music within the late Romantic and early 20th-century styles. He studied at the Royal Conservatory in Brussels and later became a professor there, influencing a generation of musicians. Mortelmans' notable works include orchestral compositions, chamber music, and vocal pieces, with "De Zwanen" (The Swans) and "Driestemmige Zang" (Three-part Song) among his celebrated choral arrangements. His music is characterized by lush harmonies, expressive melodies, and a blend of lyrical and dramatic elements, reflecting the emotional depth of the Romantic tradition. Though he was not as widely recognized as some of his contemporaries, Mortelmans played a significant role in the development of Belgian music during his time. His compositions often incorporate themes from Belgian folklore and history, contributing to the national identity in music. Mortelmans' influence is evident in the works of later Belgian composers, underscoring his importance in the cultural landscape of Belgium's musical heritage.