Near the upmarket shops of Avenue Louise, this Belgian designer’s flagship is all muted pastel shades – all the better to let her haute couture lingerie shine. Since the 1990s, Gilson has been transforming silk and lace into some of the world’s most refined kimonos, camisoles, nightgowns and more. Her exquisite creations are worn by everyone from Kate Moss to Monica Bellucci, via the odd siren in the James Bond franchise. The boutique offers a made-to-measure service, and a bridal trousseaux of dreams.