This is demonstrated in the exhibition's giant model of a City Hall Tower for Philadelphia that was never built, a dramatic double helix derived from the discovery of DNA in 1953.

WSJ: Ancient Modernism | 'Louis Kahn: The Power of Architecture' | Vitra Design Museum, Germany | By Colin Amery

His career falls into some fairly neat art-historical patterns, and the exhibition is, in this respect, a model of clarity.

WSJ: Review: Art and Showmanship | 'Damien Hirst' at Tate Modern in London