Style may course through the veins of this Milan-based executive (her mother, Consuelo Castiglioni, is the designer of Marni), but she's no fussy fashionista. "I don't like to follow the runway look," she says. I prefer to personalize it and make it my own. Castiglioni, Marni's director of special projects, applies the same individualistic aesthetic to the airy house she shares with her partner, Federico Ferrari, and their son, Filippo. A former ceramics factory in the Corso Magenta area, the whitewashed space serves as a neutral backdrop for the couple's collection of midcentury furniture and objects. When we renovated, our idea was to create a modern, clean environment for our favorite pieces. And, of course, generous storage space for her extensive wardrobe, which contains mostly Marni (surprise!), with some Comme des Garçons and Vionnet thrown in for good measure. See the interactive slideshow