Diagrams are playing an increasingly important role in architecture and city planning. They help to make complex ideas, systems and relationships easy to visualize and help to communicate these, crossing linguistic and cultural barriers. Diagrams illustrate bold visions and unexpected approaches and are a key component for developing complex construction projects – and they thus play their part in realizing these projects successfully. What is more, they don’t just serve to provide information – they are also miniature, individually designed items that bear the signature of their creator. They are a new, inspiring art form. This book, volume 1 of Architectural and Program Diagrams from the Construction and Design Manual series offers an almost infinite plenitude of ideas and possible solutions for everything to do with planning and construction on 416 pages, with an introductory essay on the importance of diagrams when imparting and presenting architecture.