Museums and libraries are highly debated architectural tasks of the present: a sufficient reason to address collecting and displaying as potential and concern of architecture. The three contributions in this volume from the lecture series of the Department of Architecture at ETH Zurich illuminate what architecture can contribute to the formation of cultural identities, the pressures of change that traditional typologies face today, and how architecture itself ultimately becomes an object of collecting and displaying. Christ & Gantenbein have proposed an equally unconventional and controversial extension for the Zurich National Museum. Max Dudler has emerged as an architect of exemplary library buildings in Münster and Essen. Winfried Nerdinger directs the Architecture Museum of the Technical University of Munich, which is one of the most important architecture collections in Europe.