In the development of contemporary architecture, no one has had a greater influence than Louis I. Kahn, whose many buildings include the Salk Institute, the Yale Study Center, and the Exeter Library. He is remembered, however, not only as a master builder, but also as one of the most important and creative thinkers of the twentieth century. For Kahn, the study of architecture was the study of human beings, their highest aspirations and most profound truths. He searched for forms and materials to express the subtlety and grandeur of life. In his buildings we see the realization of his vision: luminous surfaces that evoke a fundamental awe, silent courtyards that speak of the expansiveness and the sanctity of the spirit, monumental columns and graceful arches that embody dignity and strength. Updated with a new preface, this classic work is a major statement on human creativity, showing us Louis Kahn as architect, visionary, and poet.