The Rem Koolhaas of such monumental buildings as the CCTV tower'which looms over central Beijing'is gone, replaced by a Rem Koolhaas who wants his buildings to blend in. As director of the Venice Architecture Biennale in 2014, Koolhaas suggested that he was tired of architectural pyrotechnics. Now comes the Prada Foundation, a 100-year-old distillery complex turned contemporary art center. It boasts some 120,000 square feet of exhibition space (more than Renzo Piano's new Whitney Museum), much of that in new buildings. But Koolhaas repeatedly described the project as if it were just a renovation.