"Light, whose beauty within darkness is as jewels that one might cup in one's hands; light that hollowing out darkness and piercing our bodies, blows life into `space"'.'Tadao AndoThis thesis book documents the process and procedure of a two-year study of how daylight can be manipulated by design to enhance and elevate the experiential qualities of sacred space and then applies those characteristics to the design of an architectural thesis project.The exploration involved two major points of focus: one was the exploration to identify the principle qualities and characteristics of natural light and the other, to apply those principles of light into built form.This paper is presented in five processes: an introduction, three types of reflection, and a conclusion. Process I, presents the theoretical underpinning on the subject of light and identifies the key qualities and characteristics of light and the daylighting principles applied by Louis I. Kahn and Tadao Ando in the formulation of sacred space. Process II, presents the articulation of the necessary criteria to design a sacred space. Process III, applies the daylighting strategies to the design of a "one-volume" library for displaying Leonardo da Vinci's Codex. Process IV, presents an alternate scenario and an explanation of architecture as meaning. Process V, summerizes the meaning of the architecture and experience of the Library. 'Ando, Tadao, Complete Works, Phaidon Press Limited, London, (1997). / Department of Architecture