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Encyclopedie volume . Groundlevel floor plan of the Thtre de l'Opra on the rue SaintHonor PalaisRoyal Paris also known as Moreau's opera house Diderot's Encyclopdie vol Thtres Salle de l'Opra plate inauguration of the theatre bnf fr image langEN Gallica architect Creator PierreLouis MoreauDesproux engraver Robert Bnard Book