HOMECOMING: Christian Dior is going home — to 30 Avenue Montaigne — for its couture show July 6, showing high fashion in its gilded gray salons for the first time in a decade. There will be one show for clients, another for press. Rather than a cost-cutting measure, Dior honcho Sidney Toledano characterized the venue change as part of efforts to underscore Dior’s brand codes and rich heritage. “We want to do it in this house again to feel at Dior. We really want to transport the spirit,” he said. The last few seasons, John Galliano has shown his couture creations in a large tent erected in the gardens of the Rodin Museum in Paris. Meanwhile, Dior’s boutique at Saint-Germain-des-Prés unveiled some eye-catching windows last week: giant M&M-like discs bearing the names Christiane Dior and Jeanne Galliano. They’re artworks by Agnès Thurnauer, who transformed the designers’ names into “feminine” versions in a wink to the relative absence of women in the history of art. They’ll remain until June 12.