The vehicle rather than the content: the authors of this volume test what an interdisciplinarily conducted science of architecture might accomplish. They approach with curiosity the controversial temporary structure in the castle square and react with surprising answers to questions which have sparked off this central location in the capital as an example of the theory of urban palimpsest. With essayistic ease and refreshing distance from the ideologically loaded »castle debate«, a kaleidoscope of readings in contemporary architecture is given complete expression in their urban-discursive context.