The String Quartet No. 6 in F minor, Op. 80 was composed by Felix Mendelssohn in 1847. It was the last major piece he completed before he died two months later on 4 November 1847. He composed the piece as an hommage to his sister Fanny who had died on 17 May of that year and it bore the title "Requiem for Fanny."
| Date of composition | 1847 | 
| Premiered | 1847, October 5th | 
| First published | 1850, Breitkopf & Härtel in Leipzig, Germany | 
| Dedicated to | Fanny Hensel Mendelssohn | 
| Type | String Quartet | 
| Tonality | F Minor | 
| Catalogue | Op. 80 | 
| Approx. duration | 30 minutes | 
| Instruments | 
                                                                      Viola
                                                     Cello 2x Violin  | 
            
| Autotranslations beta | 
                                   Felix Mendelssohn: Quatuor à cordes n°6 en fa mineur, Op. 80 Felix Mendelssohn: Quartetto d'archi n. 6 in fa minore, Op. 80 Felix Mendelssohn Bartholdy: Streichquartett Nr. 6 f-moll, Op. 80  | 
            
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