Weiwei

For part of the year, the artist and activist Ai Weiwei works in a cavernous 30,000-square-foot studio on the underground levels of a former 19th-century brewery in Berlin. Its triple-height vaulted cellars, which Ai, a self-taught architect, renovated himself after leaving his native China in 2015, are now pristine and well-lit, but when he first…