Peter Märkli is one of the most important Swiss architects working today. As professor of architecture and construction at ETH Zurich, he has always made the concepts of the void and the limit central to his teaching: for him, the articulation of the void, the external space, plays a role that is as essential as the expression of the façade, a limit separating inside from outside. A celebration of Märkli’s years as chair, this book offers more than one hundred student projects created during his professorship, a selection of teaching documents, and a conversation with Märkli that further illuminates his interests and views.