Ernest MacMillan (1893–1973) was a prominent Canadian conductor, composer, and music educator, primarily known for his contributions to classical music. He played a crucial role in the development of Canadian orchestral music and was instrumental in raising the profile of Canadian composers. MacMillan's genre primarily encompassed classical music, with a focus on orchestral and choral compositions. Among his notable works are "The Four Seasons," a suite for orchestra, and "The Prophecy," a choral piece that reflects his interest in blending Canadian themes with traditional classical forms. He also arranged and orchestrated numerous folk songs, incorporating nationalistic elements into his compositions. In addition to his work as a composer, MacMillan served as the conductor of the Toronto Symphony Orchestra and was a significant figure at the University of Toronto, where he taught and influenced generations of musicians. His impact on music extended beyond his compositions, as he strongly advocated for the promotion of Canadian music and helped establish a national identity in the arts. MacMillan's legacy is marked by his commitment to education and his efforts to cultivate a rich cultural landscape in Canada.