The beauty of the architecture is not just the exterior. In the interior of the building, according to the intention of the architectural designer, it is impossible to overlook the geometrical beauty of the meeting of the pillar and the ceiling, the meeting of the wall and the wall, and the meeting of space and space. Furthermore, if the building is designed to naturally manage the light inside and outside, the subtle color created by the light is added to its geometrical beauty, giving us another beauty of the building.