Johan Peter Emilius Hartmann was, together with his son-in-law Niels W. Gade, the leading Danish composer of the 19th century, a period known as the Danish Golden Age. According to Alfred Einstein, he was "the real founder of the Romantic movement in Denmark and even in all Scandinavia". J.P.E. Hartmann was the third generation of composers in the Danish musical Hartmann family.

Niels Wilhelm Gade was a Danish composer, conductor, violinist, organist and teacher. Together with Johan Peter Emilius Hartmann, he was the leading Danish musician of his day, in the period known as the Danish Golden Age.