Franz Joseph Haydn (1732 – 31 May 1809) was a German Austrian composer of the Classical period. He was instrumental in the development of chamber music such as the string quartet and piano trio. His contributions to musical form have led him to be called "Father of the Symphony" and "Father of the String Quartet".

Haydn spent much of his career as a court musician for the wealthy Esterházy family at their Eszterháza Castle. Until the later part of his life, this isolated him from other composers and trends in music so that he was, as he put it, "forced to become original". Yet his music circulated widely, and for much of his career he was the most celebrated composer in Europe.

He was a friend and mentor of Mozart, a tutor of Beethoven, and the elder brother of composer Michael Haydn.

Joseph Haydn was born in Rohrau, Austria, a village that at that time stood on the border with Hungary. His father was Mathias Haydn, a wheelwright who also served as "Marktrichter", or marketplace supervisor. Haydn's mother Maria, née Koller, had worked as a cook in the palace of Aloys Thomas Raimund, Count von Harrach, the presiding aristocrat of Rohrau. Neither parent could read music;[d] however, Mathias was an enthusiastic folk musician, who during the journeyman period of his career had taught himself to play the harp. According to Haydn's later reminiscences, his family was extremely musical, and they frequently sang together and with their neighbours.

Haydn's parents had noticed that their son was musically gifted and knew that in Rohrau he would have no chance to obtain serious musical training. It was for this reason that, around the time Haydn turned six, they accepted a proposal from their relative Johann Matthias Frankh, the schoolmaster and choirmaster in Hainburg, that Haydn be apprenticed to Frankh in his home to train as a musician. Haydn therefore went off with Frankh to Hainburg and he never again lived with his parents.

Life in the Frankh household was not easy for Haydn, who later remembered being frequently hungry and humiliated by the filthy state of his clothing. He began his musical training there, and could soon play both harpsichord and violin. He also sang treble parts in the church choir.

There is reason to think that Haydn's singing impressed those who heard him, because in 1739 he was brought to the attention of Georg Reutter the Younger, the director of music in St. Stephen's Cathedral in Vienna, who happened to be visiting Hainburg and was looking for new choirboys. Haydn passed his audition with Reutter, and after several months of further training moved to Vienna (1740), where he worked for the next nine years as a chorister.

Haydn lived in the Kapellhaus next to the cathedral, along with Reutter, Reutter's family, and the other four choirboys, which after 1745 included his younger brother Michael. The choirboys were instructed in Latin and other school subjects as well as voice, violin, and keyboard. Reutter was of little help to Haydn in the areas of music theory and composition, giving him only two lessons in his entire time as chorister. However, since St. Stephen's was one of the leading musical centres in Europe, Haydn learned a great deal simply by serving as a professional musician there.

Like Frankh before him, Reutter did not always bother to make sure Haydn was properly fed. As he later told his biographer Albert Christoph Dies, Haydn was motivated to sing well, in hopes of gaining more invitations to perform before aristocratic audiences, where the singers were usually served refreshments.

Read more: https://en.wikipedia.org/wiki/Joseph_Haydn