Martin Margiela is the latest designer to add his name to the thinning Paris couture calendar. The secretive Belgian has been "invited" by the Chambre Syndicale to the official couture roster this July. A Margiela spokeswoman said the house would exhibit his so-called artisanal collection of handmade pieces in a still-life presentation. Margiela showed his artisanal clothes off-calendar during January's couture. Meanwhile, the house is gearing up for a retrospective in Hong Kong , opening June 7, in the building that will house its new boutique in that city, which is slated to open in late July.