If for the architects of modernity silos were an iconic reference, for architects of today they are a mark of the past, and something to act upon. This is true for the British Thomas Heatherwick, who working on a 1920s grain silo in Cape Town (South Africa) recently completed the Zeitz Museum of Contemporary Art Africa, popularly known as Zeitz MOCAA, the continent’s largest institution devoted to displaying artistic works. Eighty galleries take up the old concrete deposits, surrounding a 27-meter, 10-story atrium to form an interior space that functions like an active cavern. The exterior presents a serene but striking facade, with elegantly bulging windows of light glass on the upper half.