| Title | String Quartet in G major | 
| Alternative title | String Quartet No.21 | 
| Creators | Joseph Haydn (composer) | 
| Opus | Hob.III:21n401 III:21 | 
| Instrumentation | 2 violins, viola and cello | 
| Number of movements | 4 | 
| Keys | G major | 
| Composed | 1769 | 
| First published | — | 
| Dedication | — | 
| Tempo markings | — | 
| Metronome markings | — | 
| Time signatures | — | 
| Average duration (sec) | — | 
| Number of measures | — | 
| Composition types | Quartets | 
| Period | Classical | 
| View on IMSLP |  | 
| Code |  | 
| Title click for details | Metronome | Key | Measures | 
|---|---|---|---|
| Allegro moderato | — | G major | — | 
| Minuet - Trio | — | G major | — | 
| Largo | — | C major | — | 
| Finale. Presto | — | G major | — | 
| Details | Section | Arranged for | Arranger | 
|---|---|---|---|
| view | Complete | piano | Christian Kraus | 
| view | *For 3 Violins (Grünwald) | cello and piano | Philipp Lamoury | 
| Details | Section | Type | Publisher | Date | File | 
|---|---|---|---|---|---|
| view | Complete | — | — | — | Complete Score · view | 
| view | Complete | — | G. Henle Verlag | 1963 | Complete Score · view | 
| view | Complete | parts | — | — | Violin 1 · view Violin 2 · view Viola · view Cello · view Color Cover · view | 
| view | Complete | parts | — | — | Violin 1 · view Violin 2 · view Viola · view Cello · view Color Cover · view | 
| view | Complete | parts | — | — | Violin 1 · view Violin 2 · view Viola · view Cello · view Color Cover · view | 
| view | Complete | parts | Litolff | — | Violin 1 · view Violin 2 · view Viola · view Cello · view | 
| view | Complete | Arrangement for piano | Christian Kraus | 2022 | Complete Score · view | 
| view | *For 3 Violins (Grünwald) | Arrangement for cello and piano | E. Minier | 1878 | Complete Score and Cello Part · view Complete Score · view Cello Part · view | 
(No recordings)
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