Johann Michael Haydn was baptized on September 14, 1737, in Rohrau, Lower Austria, the exact date of his birth is unknown... Five years after his famous brother Joseph, their parents being a wheelwright and a cook. Michael Haydn left home around 1745 to attend the choir school at St. Stephen's Cathedral in Vienna, where he received instruction in singing, keyboard and violin. It was at St. Stephen's that Haydn gained a reputation for his unusually clear and beautiful voice, as well as for its extremely large range of three octaves. He was dismissed from St. Stephen's when his voice broke.
In 1757, after a precarious few years (probably in Vienna), Haydn was appointed Kapellmeister to the Bishop of Grosswardein in Hungary, now Oradea, Romania. He served the Bishop until 1763, when he accepted the position of court musician and Konzertmeister to Archbishop Sigismund Schrettenbach in Salzburg, who was renowned as a generous patron of the arts. This appointment had a profound impact on the young Mozart. It was also through this appointment that Haydn met Maria Magdalena Lipp, soon to be his wife, she was a singer in the archbishop's court and daughter of the court organist Ignaz Lipp. The two were married in 1768. The couple's only child, Aloysia Josepha, was born in 1770. She only lived for one year.
Next, in 1777 Johann Michael Haydn took over as the organist at Dreifaltigkeitskirche (Trinity Church). When Mozart left the employ of the Archbishop Hieronymus Colloredo in 1781, Haydn took over at the cathedral as well. During the last years of his life, Haydn was frequently ill. He died in Salzburg on August 10, 1806. He was buried in the cemetery at St. Peter's, where, in 1821, his friends erected a memorial in his honor.
Haydn was an extremely versatile composer who wrote in both the stile antico, represented by the music of Fux, and in more modern styles; his masses followed the tradition of concluding the Gloria and Credo