As massive and magnificent as the house is, Lutens, who is famously reclusive, has shown it to hardly anyone. In fact, he doesn’t even sleep in it; he spends most of his time in a small studio outside of town. The house “chased me out,” he says. Here, a dining room, in which he never dines. The works on the wall are by Paul Jouve; the table is Lutens’ design.