an Entity references as follows:
Julius Reinhard Oppel (1878 in Grünberg, Hesse – 1941 in Leipzig) was a German composer. He studied at the Hoch Conservatory in Frankfurt 1903–1909, was briefly an organist in Bonn, then from 1911 professor of composition at the , and from 1928 professor of music theory at the Leipzig Conservatory. Oppel was a student, correspondent, and friend of Heinrich Schenker, the famous Viennese Jewish music theorist, and made efforts to disseminate Schenkerian theory while a professor at Leipzig.