The history of the property dates back to the late 17th century but the name and current design of the building is from the 1750s when it was owned by the Holstein family and expanded by royal sculptor Jacob Fortling.

[1] The two-storey, nine-bay house was possibly designed by General Building Master Lambert van Haven.

In 1767, he commissioned court sculptor Jacob Fortling to carry out another expansion of the Holstein Mansion.

The house remained in the hands of the Holstein family until it was acquired by Supreme Court Justice Christian Colbjørnsen in 1807.

Ammondsen, a ship captain who had made a fortune on the China trade, was active on Copenhagen's turbulent property market during the exonomic crisis that followed the British bombardments of 1801 and 1807.

It was subsequently adapted for use as the new Royal Museum of Natural History under supervision of Jørgen Hansen Koch.

The zoologist Johannes Theodor Reinhardt was appointed inspector of the Royal Museum of Natural History's 1st Department (mammals and birds) in 1848.

The building in Stormgade was sold to the insurance company Den almindelige Brandforsikring for Landbygninger (now Alm.

The complex also comprises the two perpendicular rear wings from 1706 and a half-timbered building in the yard from the second half of the 17th century.