had received from them a deep impression. String Quartet No. 8 in F major, K. 168 (1773) String Quartet No. 9 in A major, K. 169 (1773) String Quartet No. 10 in C major, K. 170 (1773) String Quartet No. 11 in E major, K. 171 (1773) String Quartet No. 12 in B major, K. 172 (1773) String Quartet No. 13 in D minor, K. 173 (1773) Haydn Quartets, K. 387, 421, 428, 458, 464, 465, Op. 10 (1782–1785) Mozart returned to the quartet in the early 1780s after he had moved to Vienna, met Haydn in person, and developed a friendship with the older composer. Haydn had just published his set of six quartets, Op. 33, which are thought to have been a stimulus to Mozart in returning to the genre. These quartets are often regarded as among the pinnacles of the genre. String Quartet No. 14 in G major, "Spring", K. 387 (1782) String Quartet No. 15 in D minor, K. 421/417b (1783) String Quartet No. 16 in E major, K. 428/421b (1783) String Quartet No. 17 in B major, "Hunt", K. 458 (1784) String Quartet No. 18 in A major, K. 464 (1785) String Quartet No. 19 in C major, "Dissonance", K. 465 (1785) String Quartet No. 20 in D major, "Hoffmeister", K. 499 (1786) This work was published by (dedicated to?) Franz Anton Hoffmeister, as well as the Prussian Quartets. Prussian Quartets, K. 575, 589, 590, Op. 18 (1789–1790) Mozart's last three quartets, dedicated to the King of Prussia, Friedrich Wilhelm II, are noted for the cantabile character of the parts for cello (the instrument played by the king himself), the sweetness of sounds and the equilibrium among the different instruments. String Quartet No. 21 in D major, K. 575 (1789) String Quartet No. 22 in B major, K. 589 (1790) String Quartet No. 23 in F major, K. 590 (1790) Others Fugues for 2 Violins, Viola and Cello, K. 405 (1782) Adagio and Fugue in C minor for 2 Violins, Viola and Cello, K. 546 (1788) (a transcription from Fugue in C minor for Two Keyboards, K. 426) Canon in C major for 2 Violins, Viola and Cello, K. Anh. 191/562c (1788, attribution uncertain) String Quartet in E minor, K. 417d (1789; fragment) String Quartet in G minor, K. 587a (1789; fragment) String quintets The string quintets (K. 174, 406, 515, 516, 593, 614), for