"PETER ZUMTHOR’s buildings are powerful statements with minimal means, an approach even reflected in his sketches. Here sketches for the Bregenz Museum, a floor plan with light flooding in, and a simple section". Taken from http://cmuarch2013.wordpress.com/tag/sketching/
peter zumthor therme vals section - Google Search
Peter Zumthor, Therme Vals, 1996
Peter Zumthor, Serpentine Gallery Pavilion garden, 2011. Watercolor.