Johann Michael Haydn (September 14, 1737 – August 10, 1806) was an Austrian composer, the younger brother of (Franz) Joseph Haydn.

Michael Haydn was born in 1737 in the Austrian village of Rohrau near the Hungarian border. His father was Mathias Haydn, a wheelwright who also served as "Marktrichter", an office akin to village mayor. Haydn's mother, the former Maria Koller, had previously worked as a cook in the palace of Count Harrach, the presiding aristocrat of Rohrau. Neither parent could read music. However, Matthias was an enthusiastic folk musician, who during the journeyman period of his career had taught himself to play the harp, and he also made sure that his children learned to sing; for details see Mathias Haydn.

Michael's early professional career path was paved by his older brother Joseph, whose skillful singing had landed him a position as a boy soprano in St. Stephen's Cathedral in Vienna, under the direction of Carl Georg Reutter. The early 19th century author Albert Christoph Dies, reporting from Joseph's late-life reminiscences, says the following:

:<i>Reutter was so captivated by [Joseph]'s talents that he declared to the father that even if he had twelve sons, he would take care of them all. The father saw himself freed of a great burden by this offer, consented to it, and some five years after dedicated Joseph's brother Michael and still later Johann to the musical muse. Both were taken on as choirboys, and, to Joseph's unending joy, both brothers were turned over to him to be trained."

The same source indicates the Michael was a brighter student than Joseph, and that (particularly when Joseph had grown enough to have trouble keeping his soprano voice), it was Michael's singing that was the more admired.

Shortly after he left the choir-school, Michael was appointed Kapellmeister at Großwardein and later, in 1762, at Salzburg. The latter office he held for forty-three years, during which time he wrote over 360 compositions for the church and much instrumental music. He was acquainted with Mozart, who had a high opinion of his work, and the teacher of both Carl Maria von Weber and Anton Diabelli.

He remained close to Joseph all of his life, and was highly regarded by his brother, who felt that Michael's religious works were superior to his own.

Michael Haydn died in Salzburg at the age of 68.

Haydn's sacred choral works are generally regarded as being his most important, including the </i>Requiem pro defuncto Archiepiscopo Sigismundo (Requiem for the death of Archbishop Siegmund) in C minor, which greatly influenced the Requiem by Mozart, Missa Hispanica (which he exchanged for his diploma at Stockholm), a Mass in D minor, a Lauda Sion, and a set of graduals, forty-two of which are reprinted in Anton Diabelli's Ecclesiasticon<i>. He was also a prolific composer of secular music, including thirty symphonies and partitas, a number of concerti and chamber music including a string quintet in C major which was once thought to have been by his brother Joseph.

The confusion continues to this day: often the Classical Archives page for Joseph Haydn has some MIDI files of Michael Haydn compositions, which are eventually moved to the general H page.

Michael Haydn was the victim of another case of posthumous mistaken identity: for many years, the piece which is now known as Michael Haydn's Symphony No. 25 was thought to be Mozart's Symphony No. 37 and assigned K. 444. The confusion arose because an autograph was discovered which had the opening movement of the symphony in Mozart's hand, and the rest in somebody else's. It is now thought that Mozart had composed a new slow introduction for reasons unknown, but the rest of the work is known to be by Michael Haydn. The piece, which had been quite widely performed as a Mozart symphony, has been performed considerably less often since this discovery in 1907.

Michael Haydn never compiled a thematic catalog of his works, nor did he ever supervise the making of one. The earliest catalog was compiled in 1808 by Nikolaus Lang for 'Biographische Skizze'. In 1907 Lothar Perger compiled a catalogue of his orchestral works for 'Denkmäler der Tonkunst in Österreich', which is much more reliable. And in 1915 Anton Maria Klafsky undertook a similar work regarding the sacred vocal music.

Some of Haydn's works are referred to by Perger numbers, from the thematic catalog of his works compiled by Lothar Perger in 1907.

*List of compositions by Michael Haydn

* Charles H. Sherman and T. Donley Thomas, </i>Johann Michael Haydn (1737-1806), a chronological thematic catalogue of his works. Stuyvesant, New York: Pendragon Press (1993) *Dies, Albert Christoph (1810) Biographical Accounts of Joseph Haydn, Vienna. English translation by Vernon Gotwals, in Haydn: Two Contemporary Portraits, Milwaukee: University of Wisconsin Press. *Rosen, Charles (1997) The Classical Style''. New York: Norton.

* * *The Michael Haydn Project Facts and worklists for Michael Haydn and his contemporaries * Michael Hadyn - MIDI files at Classical Archives