Jahn was born in Hungary in 1744 and died in Vienna, 26 February 1810. He was appointed Imperial caterer for
Schönbrunn Palace in 1772. In 1775 he began running a restaurant in the
Augarten, and in 1782 opened an adjacent concert hall, at which many famous musicians played over the years. Jahn's Hall was a part of Jahn's restaurant, in the main part of the city, which as of 1788 was at 6 Himmelpfortgasse. Concerts began there after the restaurant opened, and were given on a regular basis starting in 1790. In 2018 a restaurant opened close to Augarten, carrying his name. ==Works by Mozart==