Horn (instrument) the "trombon da caccia" called for by Vivaldi in his opera "Orlando finto pazzo" (1714), and his Concerto in F for violin, two "trombon da caccia", two oboes, and bassoon, RV574, was also a hooped horn. In the eighteenth century some outstanding concertos were written for solo horn and orchestra by Telemann, Christoph Förster, Michael and Joseph Haydn, Leopold and Wolfgang Amadeus Mozart, and Carl Stamitz. Concerti grossi include concertos for two horns by Vivaldi and Bach’s First Brandenburg Concerto. At the end of the century Beethoven composed a Sonata for Horn and Piano in F major, Op. 17, for
Piano concertos by Wolfgang Amadeus Mozart orchestra" rather than the more obviously "piano" concertos of the nineteenth century (e.g., that of Grieg etc.). Because Mozart was developing the form of his concertos as he wrote them and not following any preconceived "rules" (apart, presumably, from his own judgement of taste), many of the concertos contravene one or other of the generalisations given above. For example, K. 488 in A major lacks new expositional material, and "merely" repeats the preludial material; further, it effectively merges the first ritornello and the middle section, as does K. 449 in E. Several of the later concertos do not hesitate to