Louis Spohr (1784 –1859), born Ludwig Spohr, was a German composer, violinist and conductor. Highly regarded during his lifetime, Spohr published nine symphonies, ten operas, fifteen violin concerti, four clarinet concerti, and various works for small ensemble. Spohr was the inventor of both the violin chinrest and the orchestral rehearsal mark. His output occupies a pivotal position between Classicism and Romanticism, but fell into obscurity following his death. It is now rarely heard.