Sir Alexander Campbell Mackenzie KCVO (22 August 1847 – 28 April 1935) was a Scottish composer, conductor and teacher best known for his oratorios, violin and piano pieces, Scottish folk music and works for the stage.Mackenzie was a member of a musical family and was sent for his musical education to Germany. He had many successes as a composer, producing over 90 compositions, but from 1888 to 1924, he devoted a great part of his energies to running the Royal Academy of Music.