Johann Gottfried Rosenberg's exact date of birth is not known but he was christened on 20 October 1709 in
Woldegk in the duchy of
Mecklenburg-Strelitz. In the 1730s, he was active in
Schleswig-Holstein and from 1740 in Denmark where he settled in 1752. His early works include the Margård manor house on the island of
Funen which relies on French country house architecture for inspiration. He collaborated with
Nicolai Eigtved on a number of projects in
Copenhagen in the early 1750s, including the Dehn, Bernstorff and
Berckentin Mansions in
Bredgade in the
Frederiksstaden neighbourhood which was under development around that time. North of the city, on the shore of
Lake Bagsværd, he designed the
Frederiksdal pavilion. In 1760, Rosenborg returned to Schleswig-Holstein to assume a position as master builder. His most important works there are
Gråsten Palace (1758–59) and
Augustenborg Castle (attributed, 1770–76). In 1771 he finished the Royal Danish Mint in Altona (Elbe) near Hamburg. ==Gallery==