The Ordre de l'Union Parfaite was created by Queen consort Sophie Magdalene of Denmark and Norway on 7 August 1732 to celebrate the tenth anniversary of her happy marriage with King Christian VI of Denmark and Norway.

Its motto was In felicissimæ Unionis Memoriam ("In Commemoration of the Happiest [Marital] Union").

The use of French was not unusual in the eighteenth century royal Danish court or in Sophie Magdalene's German homeland, where other such examples exist, such as the Ordre pour le Mérite and the Ordre de la Sincérité.

The badge or "jewel" of the Order was a white enamelled cross, each arm of which was capped by a golden crown.

A blue oval medallion, encircled by diamonds, imposed on the center of the cross displayed the crowned intertwined monograms of Sophie Magdalene and Christian VI.