On his return to Vienna in 1756 he became famous as teacher and composer, in 1759 he was appointed conductor to the private band of Count Morzin, for whom he wrote several orchestral works (including a symphony in D major erroneously called his first), and in 1760 he was promoted to the sub-directorship of Prince Paul Esterhazy's Kapelle, at that time the best in Austria.
Perhaps the outstanding work to show this inspired conservatism is his Piano Quintet in D major of 1959, Opus 23.
The last movement of the D major sonata is perhaps the most interesting in its variety of textures.
