List of concertos by Joseph Haydn
The following is a partial list of concertos by Joseph Haydn (1732–1809). In the Hoboken catalogue of Haydn's works, concertos for most instruments are in category VII with a different letter for each solo instrument (VIIa is for violin concertos, VIIb is for cello concertos, etc.). The exceptions are the concertos for keyboard and for baryton which are placed in categories XVIII and XIII, respectively. For violin. Other Concertos (Hob. VIIa:A1/B1/B2/D1/G1) are not authentic, i.e. are not by Joseph Haydn. Haydn also wrote several more concertos, which have  all been lost. For 2 lire organizzate. These concertos were written for Ferdinand IV, King of Naples whose favorite instrument was the lira organizzata -- an instrument similar to the hurdy-gurdy. Modern performances use flute and oboe (or two flutes) as the soloists. For baryton. There are 3 concertos for baryton known but which have been lost or have doubtful authenticity. For harpsichord, organ or piano. On the above list, where as noted No. 9 is doubtful, only Nos. 3, 4, and 11 are considered confirmed as genuine. Two works often identified and even published as piano concertos by Haydn , and commonly taught to younger piano students, are actually Divertimenti, grouped in Hob. XIV. Specifically, they are Hob. XIV:3 (the "Little Concerto" in C major), and Hob. XIV:4 (another "concerto" in C major). However, another work of similar technical difficulty that is also identified and published as a concerto is the Concerto in F, Hob. XVIII:F1. See also. List of compositions by Joseph Haydn