Johan Halvorsen was a Norwegian composer, conductor, and violinist born on March 15, 1864, in Oslo, Norway. He is best known for his contributions to classical music, particularly in the late 19th and early 20th centuries. Halvorsen studied at the Royal Conservatory of Music in Oslo and later became a prominent figure in the Norwegian music scene. Throughout his career, Halvorsen composed various works, including orchestral pieces, chamber music, and operas. One of his most famous compositions is the Passacaglia for violin and viola, which showcases his skill in blending traditional Norwegian folk elements with classical forms. He passed away on December 4, 1935.