This study deals with an analogy between architecture and music by taking a case of the transition from Romanesque to Gothic of European medieval ages. The aim of this study is to regard both of them as combinations of small parts, and to point out how each element is united. During the medieval ages, architecture has expanded from Romanesque style to Gothic style, and music has changed from monophony such as Gregorian Chant to polyphony which was derived from them. Both architecture and music have the aspect that they have changed from simply additional structure to both additioal and devisional one.
