Louis Spohr (April 5, 1784 – October 22, 1859), born Ludwig Spohr, was a German composer, violinist and conductor.
Highly regarded during his lifetime, Spohr composed ten symphonies, ten operas, eighteen violin concerti, four clarinet concerti, four oratorios and various works for small ensemble, chamber music and art songs. 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, when his music was rarely heard. The late 20th century saw a revival of interest in his oeuvre, especially in Europe.