The String Octet in E-flat major, Op. 20, MWV R 20, was written by the 16-year-old Felix Mendelssohn during the fall of 1825 and completed on October 15.
During the fall of 1825, at the age of sixteen, Felix Mendelssohn penned the String Octet in E-flat major, Op. 20, MWV R 20, with completion taking place on October 15.