A window is a mediating device between our body and the environment: by simply opening or closing it, we can regulate air, light, and sight. Both climatic and cultural conditions, alongside technological developments, shape the architecture of windows. Switzerland's diverse climate, which results from the Alps' particular geomorphology and its geographical location at the crossroads of European cultures, has generated a wide variety of window forms. The collection of windows gathered from field research takes the reader on a tour of the diverse practices of living and working in the country. Full-page hand drawings portray each window as a part of a complex network of elements and a site of knowledge. Short texts offer insight into various historical, technological, and socio-economic conditions of each spatial configuration. Conversations with Swiss architects reveal challenges of window design in contemporary building processes. The book unveils the role of the window as a tool for resourceful living practice and suggests ecological perspectives for its architectural design.