Large cities generate microcosms with their own dynamics, and mixed-use buildings are the architectural synthesis of this process. This book is a collection of today's most innovative projects in the creation of multipurpose spaces that encompass an extensive and diverse range of users and activities. Each of the projects presented proposes innovative and creative solutions. Functionality and symbiosis between the different uses is clearly reflected in this selection. The compilation includes explanations from the architects themselves, their choice of materials and a wealth of graphic material such as photographs, floor plans and sections.