Prince Henry (1726-1802) is wearing the uniform of the 19th Prussian Regiment, the orange ribbon and star of the Order of the Black Eagle, and the cross of the (?) Union Parfait. He was the younger brother of Frederick II of Prussia (Frederick the Great). From the age of 14, he served in the Prussian army and fought in the Silesian Wars and the Seven Years' War. In 1752, he married Princess Wilhelmina of Hesse-Cassel, but they had no children.

The miniature was probably copied from a portrait by Johann Heinrich Tischbein the Elder but the identity of the artist is unknown. It is inscribed on the back in nineteenth-century handwriting: Prinz Heinrich Brüder Fredrich II des Grosses.