A pair of interior architects with a years-in-the-making furniture collection recast an old Belgian factory—in Bellem, a 25-minute drive out of Ghent and halfway to Bruges—as a playful family home. The stars of the living room are a pair of pink Bird chairs by Harry Bertoia for Knoll, accented by a brass-and-steel coffee table designed by homeowners as well as vintage marble-topped and wood occasional tables and antique rugs are from Morocco. Photo by Frederik Vercruysse.