In the living room, Caspar educates his young son Roemer about the finer points of modern design. The red leather Gigi is van den Berg’s racy yet refined swivel armchair. Looking at this chair, it comes as no surprise that the designer drives a Porsche. “It’s from the late ’90s, but it’s already a classic,” says Caspar. “I just love the versatility of this one—you can sit forwards or sideways in it.” Van den Berg also designed the stainless-steel coffee table. The purple sofa was designed by Rodolfo Dordoni, and the Glo-Ball lamp is by Jasper Morrison.