The avant-garde theater producer, Erwin Piscator, hired Breuer to renovate his Berlin apartment. As designed by Breuer, the apartment had bare walls with dark, contrasting baseboards. Breuer furnished the apartment with lightweight, tubular-steel furniture that seemed to hover in space. A long, thin band of hanging cabinets ran the entire length of the dining room. Exercise equipment took up one wall of Mr. Piscator's bedroom, underscoring contemporary associations between health and modernism.