Pierre Contant d'Ivry

Pierre Contant d'Ivry (11 May 1698 in Ivry-sur-Seine – 1 October 1777 in Paris), was a French architect and designer working in a chaste and sober Rococo style and in the goût grec phase of early Neoclassicism.

Later Contant d'Ivry worked for Louis-Philippe, duc d'Orléans, for whom he transformed interiors of the Palais-Royal, Paris, in 1754, designs that were widely admired and published by Diderot and d'Alembert in the Encyclopédie, 1762, where Jacques-François Blondel praised their "correct middle pathway between two excesses, that of the heavy weight of our ancients and that of frivolity".

[4] Contant d'Ivry was also responsible for the exteriors of the northern part of the east wing[5] (now on the Rue de Valois), the avant corps of which, "with its giant balcony brackets and rather inventive detailing, combines Rococo-style decorative charm with a certain Classical solidity in its massing.

While the municipality of Paris was responsible for the opera house and hired its own architect, Pierre-Louis Moreau-Desproux, who also designed the new facades on the Rue Saint-Honoré side of the building, Louis Philippe engaged Contant d'Ivry, who designed the interiors of the reconstructed corps de logis, the facades of the Cour d'Honneur (on the garden side), and a grand staircase,[7] the "splendid escalier d'honneur, [which] with its domed covering and dramatic curved descent, is justly famous.

Though the foundation stone was laid by Louis XV in 1763, funds lagged, and after Contant d'Ivry's death, the plans were modified, then the partially built structure was razed and begun anew.