This publication offers a rare and fascinating insight into the teaching world of renowned architect Peter Zumthor. Based on previously unpublished material – including letters, sketches and photographs – as well as recent interviews with former students, assistants, colleagues and Zumthor himself, it examines the origins, historical context and far-reaching influence of his pioneering course “Primo Anno” (1996–1999) at the Accademia di Architettura di Mendrisio. The “Primo Anno” exercises form the structural basis of the book, while thematically organised interviews open up diverse perspectives on Zumthor’s thinking and his unique didactic approach. Narrative chapters connect these elements into a common thread, reflecting on the findings and placing them in a broader theoretical context. Based on his dissertation, written between 2018 and 2021, as well as previously unpublished materials and interviews, the Swiss-Brazilian architect Rafael Lorentz documents a rediscovery that not only sheds light on Zumthor’s thinking, but also reveals his formative influence on the identity of the Accademia.