He worked on the construction of Johanne Louise Heiberg's villa in the Tosenvænget neighborhood, Hvidøre and Springforbi north of Copenhagen, Aalborg Cathedral School in Aalborg tand, History|College of Advanced Technologies and Marstrand's Brewery in Copenhagen.

He was a prolific art collector, especially of faience and porcelain by Danish manufacturers.

[3] He bequeathed a substantial part of his collection to the Danish Museum of Arts and Crafts.

[1] Frohne is today above all remembered for his study of 18th century Danish faience.

Historiske Meddelelser om Fajancefabrikker i Danmark og Hertugdømmerne i det 18.

The original manuscript, entitled Murermester Frohnes Fremstilling af Fajancernes og Stentøjets Historie, is in the collection of the Royal Danish Library (Ny Kgl.