Crown Princess Louisa (1724-51) is shown here wearing the cross of the Union Parfaite.

Louisa was the youngest child of George II and Caroline of Brandenburg-Ansbach. Her mother, Queen Caroline, died in 1737 so, from the age of 13, Louisa was brought up by her elder sister, Princess Caroline Elizabeth. On 14 September 1743, a treaty was signed between Great Britain and Denmark agreeing that Louisa should marry Prince Frederick (1723–66), son of Christian VI, King of Denmark and Norway, and Sophie Magdalene of Brandenburg-Culmbach. A month later, on 19 October 1743, Louisa left London for Hanover. She was married there by proxy on 10 November 1743, with her brother, William Augustus, Duke of Cumberland, representing Prince Frederick. She married Frederick in person at Christiansborg Castle, Copenhagen, on 11 December 1743, and they had five children. Frederick became King of Denmark and Norway on the death of his father on 6 August 1746. Louisa died at Christiansborg Castle on 19 December 1751 and was buried at Roskilde Cathedral.

Carl Gustav Pilo (1713-92) trained in Sweden, Germany and Austria, and finally in Denmark where he became court painter to Frederick V until he left for Sweden in 1772. Most of his work was large-scale portraiture but he occasionally painted in miniature. This miniature is based on one of the state portraits of Crown Princess Louisa painted by Pilo in Copenhagen soon after her marriage and may, like its companion piece of Crown Prince Frederick (420610), have been intended as a marriage portrait.