Introduction -- Preface -- An interview with Klaus Bollinger and Manfred Grohmann -- Process. Städel Museum -- Below the Green Hill -- About the magic of the structure -- Building with and within existing buildings -- A new culture of building with and within existing buildings -- Fundamental conditions for building with existing buildings -- The attitude to existing buildings -- Process. European Central Bank building -- Symbolic metamorphoses -- "We use everything that's there for functional reasons for the support structure." -- "The fairest in the land must also be good with figures" -- Innovative building shells -- Integral planning of innovative building shells -- Design process - from sketches to implementation -- Facade planning in dialogue -- Process. Sheikh Zayed Desert Learning Center -- Squaring the snake -- An algorithm opens the window -- The stony road to the Emirates -- Energy planning and sustainability -- Energy-efficient urban rehabilitation and climate protection -- Energy-efficient buildings -- Knowledge transfer for international projects -- Interview with the architects involved in the Fès project -- Projects on an urban-planning level -- Process. Rolex Learning Center -- A clear view up to Mont Blanc -- Generating geometries -- Flow of force as a design parameter -- Computational structures -- Projects an people -- Catalogue of projects -- People -- Picture credits.