In the cellar room furthest to the north about half of Rosenborg's 700 or so artefacts made of ivory and amber are displayed. They range in date from 1585 to1850.
Frederik III was the King of Denmark-Norway from 1648; he was married to Sophie Amalie of Brunswick-Lüneburg in 1643 and father to Christian V. Frederik was a son of Christian IV and Anna Cathrine of Brandenburg, but he only became Successor to the Throne after the death of his brother, Christian, the Prince Elect, in 1647.