One of the greatest composers of all time, Franz JosephHaydn made an enormous contribution in the creation and development of virtually all musical forms and genres. 1760, Haydn was appointed the official musician for the Esterhazy Princes. Only in 1790, Haydn was released and allowed to travel. Haydn went to London where he became the most important and influential musician. Haydn retired in Vienna still being in the service of Prince Nikolaus. Haydn remains one of the most popular musicians.