Felix Mendelssohn's Octet in E-flat major, Op. 20, was composed in the autumn of 1825 and completed on October 15, when the composer was 16. He wrote it as a birthday gift for his friend and violin teacher Eduard Ritz (1802-1832); it was slightly revised in 1832 before the first public performance on 30 January 1836 at the Leipzig Gewandhaus. Conrad Wilson summarizes much of its reception ever since: "Its youthful verve, brilliance and perfection make it one of the miracles of nineteenth-century music."

Date of composition 1825 (composed in the autumn of 1825 and completed on October 15)
Premiered 1936, January 30th in Leipzig, Germany
Type Octet
Tonality E Major
Catalogue Op. 20
Instruments 4x Violin
2x Cello
2x Viola
Autotranslations beta Felix Mendelssohn: String Octet en mi majeur, Op. 20
Felix Mendelssohn: String Octet in mi maggiore, Op. 20
Felix Mendelssohn Bartholdy: String Octet E-dur, Op. 20