“The importance of a drawing is immense, because it’s the architect’s language,” said the architect Louis Kahn to his masterclass in 1967. While most studies of Kahn focus on his built works or theory and use drawings mainly to illustrate these, this publication chooses to focus on Kahn's drawings as primary sources of insight into his architectural intelligence and imagination. Lavishly illustrated with over 900 high-quality reproductions of work by Kahn and his associates, incisively presented by a group of acclaimed architectural experts, The Importance of a Drawing is a deep immersion into Kahn’s work and his design process. A testament to Kahn’s masterly craft, this volume also makes a provocative primer on architectural representation by posing timely questions on how architects use drawings to see, learn, conjecture and reveal. Destined to become a standard reference on Kahn, this book is an essential addition to the libraries of established designers as well as students of architecture.