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Escalier du Conseil d'tat photo by Lansiaux Muse Carnavalet 'Le Palais Royal' cat no p. fr Escalier du Conseil d'Etat Muse Carnavalet Topographie photo PC PalaisRoyal in Paris constructed to the designs of the French architect Pierre Contant d'Ivry Scan Le Palais Royal catalog of the exhibition held from May to September cat