Abstract
The purpose of this study is to show the development process of space concept by studying on the Louis I. Kahn's painting as pre-architectural thinking. Generally the idea of an architect is represented with lots of mediums, and the architectural thinking is developed through the process. In his early days, he, as an architect, made many travel sketches of Europe. In these clays, painting was the most significant medium to him. Since 1950's, he also left lots of sketches affected by abstract painting in addition to travel sketches. The results of this study were as follows: He found the image of antiquity from his painting and he made this image into abstraction in the facade. And the image of ruins was translated the layered space which was the transitional space. And he presented 'marche' through the series of painting of various view point. The Concept of 'marche' was translated into the connections of repetitive mass in the architectural space.