Johann Sebastian Diez (08/05/1711 -19/11/1793) born in Neuhaus / Pegnitz, died in Wasserburg / Inn, was a German composer, choir director and teacher in the age of musical baroque and pre-classical music. After his studies, about which nothing else is known, Johann Sebastian Diez initially worked as an informator for a count. During a trip to Salzburg , which took him through Wasserburg am Inn, he learned that the position of choirmaster of the city church was vacant. He took over this service in 1736, married the widow of his deceased predecessor and remained there until his death. Diez led the choir of the city parish and performed his compositions there. As a teacher he trained many musicians - among his students were the composers Joseph Schlett and Johann Kaspar Aiblinger . He was also valued as a language teacher, especially in Latin. Leopold MozartWith his family he often stopped in Wasserburg on his travels and counted Johann Sebastian Diez among his friends. It is said that the young Wolfgang Amadeus Mozart played on the organ in the Church of St. Jacob. In Leopold Mozart's travel notes from 1763 there is a special mention of Mr. Choriregens Diez.