In on - auf, the Swedish artist Mikael Olsson undertakes a photographic interpretation of the Swiss architects Herzog & de Meuron's and the Chinese artist Ai Weiwei's temporary pavilion at the Serpentine Gallery in London. By investigating the traces of their creative processes in their archives, and exploring the relation between their pavilion and its shifting contexts, Olsson creates images that follow and go beyond the object, creating visual narratives uncovering issues of memory, identity and perception. The Hungarian author P ter N das introduces the artist in his essay.