This miroir de trumeau is related to a number of mirrors delivered for the duc d'Orléans before 1724. The largest mirror recorded in the inventory following his death was surmounted by a mask cresting. It measured 221 cm. high by 158 cm. wide and this testifies to the dramatic advances in the manufacture of mirror glass since the construction of the Galerie des Glaces at Versailles in 1679. A process ('coulage de la glace') invented in 1687 had enabled mirror glass to be made in sizes hitherto considered impossible, and in 1698 a piece 225 cm. high by 120 cm. wide was produced at the Manufacture Royale de la Porte Saint-Antoine.
It was Robert de Cotte, premier architecte du Roy who, according to Jean-Francois Blondel, considered himself to be the first to introduce large-scale mirrors to French interiors and by the time of the death of Louis XIV there were 298 mirrors in the Garde-Meuble de la Couronne.
The decoration of this mirror reflects the influence of the architect and designer Daniel Marot (1663-1752), who engraved a closely related mirror-pattern, with segmental pedimented cresting in his oeuvres of 1712 (illustrated in Das Ornamentwerk des Daniel Marot, Berlin, 1892, p.166). However, related ornament to the cresting of this mirror also featured in a drawing by Jean Bérain (1640-1711), Dessinateur de la Chambre de Roy, who produced a number of designs for chimneys before 1708 (Ecole des Beaux-Arts, Paris, illustrated in J. de la Gorce, Bérain Dessinateur du Roi Soleil, Paris, 1986, p.39). A mirror of virtually identical pattern, was sold anonymously at Audap-Godeau-Solanet, Paris, 14 June 1991, lot 99.