Karl Horwitz (1884 - 1925), composer from Vienna who studied with Schoenberg between 1904 - 1908. He started as a conductor but concentrated on composing at an early age. His musical style can be characterized as late-expressionistic.
His early death (after a long illness) and his way of composing, searching for the most profound and greatest expression, resulted in a very small oeuvre. Only nine of his compositions were published. Nothing is know about his unpublished works.