
Born: May 14, 1805, Copenhagen, Denmark.
Died: March 10, 1900, Copenhagen, Denmark.
Buried: Garnisons Kirkegård, Copenhagen, Denmark.
Johan was the husband of Amalia Emma Sophie Zinn, father of Emil Hartmann, and fa-ther-in-law of Niels Gade.
A prolific and respected composer, he wrote operas, choral works, songs, a symphony in G minor, and many piano pieces.