This article deals with a proportional analysis of Cologne Cathedral with regard to the medieval tradition of geometry and figurate numbers that were commonly used in the medieval period. It first outlines symbolic and geometric notions of the geometry and numbers during the medieval period, and then, interprets the proportional design of the plan and section of the cathedral in analogy with the notion. It concludes that the proportional design of the cathedral was not quite arbitrary but carefully designed for the systematic and symbolic quality of the medieval aesthetic tradition.

Abstract
 1. 서 론
 2. 중세의 기하학과 상징수
 3. 쾰른 대성당의 비례분석
  3-1. 쾰른 대성당의 역사
  3-2. 쾰른 대성당의 평면 분석
   3-2-1. 쾰른 대성당의 평면 모듈과 실측도면
  3-3. 쾰른 대성당의 단면 비례 분석
 5. 맺음말
 References

• 김호성(인하대학교 건축학과 석사) | Kim Hosung
• 박진호(인하대학교 건축학과 교수) | Park Jin-Ho Corresponding Author
• 홍민기(인하대학교 건축학과 석사과정) | Hong Minkee