“What constitutes good architecture?” is a question Werner Blaser was always asked by friends, readers, companions and students. In this comprehensive work the author sets out on a search for the answer to that question. This volume is not only a fascinating study about quality in architecture, but also a comprehensive overview of architectural history. By analysing special buildings, different aspects and interconnections become clear, which by themselves or in combination define an architectural quality. Drawing on photographs from his impressive archive, which he accompanies with short explanatory texts, the author vividly demonstrates the basic foundations of architecture and perception.