Joseph Carl Rosenbaum

Joseph Carl Rosenbaum (5 July 1770 – 26 December 1829) was an Austrian employee of the Esterházy family, later a private citizen whose house was a centre of Viennese social life.

Rosenbaum was born in Vienna in 1770, son of an official of the Esterházy family.

[1][2] He married in 1800 Therese Gassmann, an opera singer; on his marriage he had to leave his employment, and he then lived in Vienna as a private citizen.

Through his wife he knew many people in the cultural life of the city, and his house became a centre of Viennese society.

It is an important source of information about Joseph Haydn, whom he knew well, and about Viennese theatre and other local affairs.