Abstract
The purpose of this paper is to understand the meaning of 'institution' in Louis Kahn's architecture and to reveal that it is expressed through singularity and commonality, which have two aspects; formal-material(eidos-hyle) aspect and phenomenological aspect. Under these recognitions, this paper shows the detail analysis on design process of Phillips Exeter Academy Library, focusing on his writings and sketches. The results are as follows. First, the basic form is maintained through the design process of the Exeter library, and it is derived from the consideration of the human activities in the library. And second, each 'room' of the library acquires its singularity through structure and light. And the 'plan' is based on the commonality inherent in the singularity of each room. And the last, singularity and commonality are revealed not only In the relation of architectural elements but also In the relation with man and architecture.
