The second exhibition “Serial Thoughts” of the three-part series “Shades of Thought” at Metropol Kunstraum shows sculptures and series by Bill Bollinger, Hanne Darboven, Donald Judd, Imi Knoebel, Sol Lewitt, Robert Mangold, David Rabinovitch, Fred Sandback and James Turrell. The works were created between 1962 and 1992 and work very differently on the theme of series and the concept of repetition, be it numbers, shapes, time or light. Sol LeWitt, for example, favours the repetition of geometric shapes and a precise structure; in an interview from 1967, he explains his concern as “the aesthetic concept. Dimensions, sequences of geometric units, simple systems. Spiritual playgrounds. Beauty.”